/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/ps3-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:37:08,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:37:08,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:37:08,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 04:37:08,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 04:37:08,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 04:37:08,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 04:37:08,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 04:37:08,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 04:37:08,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 04:37:08,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 04:37:08,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 04:37:08,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:37:08,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:37:08,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:37:08,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:37:08,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:37:08,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:37:08,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:37:08,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:37:08,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:37:08,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:37:08,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:37:08,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:37:08,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 04:37:08,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 04:37:08,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 04:37:08,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 04:37:08,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 04:37:08,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 04:37:08,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 04:37:08,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 04:37:08,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 04:37:08,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 04:37:08,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 04:37:08,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 04:37:08,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 04:37:08,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 04:37:08,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:37:08,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:37:08,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:37:08,989 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 04:37:09,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:37:09,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:37:09,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:37:09,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:37:09,027 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:37:09,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:37:09,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:37:09,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:37:09,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:37:09,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:37:09,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:37:09,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:37:09,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:37:09,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:37:09,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:37:09,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:37:09,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:37:09,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:37:09,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:37:09,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:37:09,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:37:09,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:37:09,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:37:09,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:37:09,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:37:09,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:37:09,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:37:09,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:37:09,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:37:09,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:37:09,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:37:09,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:37:09,401 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:37:09,402 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:37:09,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound2.c [2021-05-06 04:37:09,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4804acd6/7c2ff6921924444386406c283945667b/FLAG74e46a343 [2021-05-06 04:37:09,843 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:37:09,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound2.c [2021-05-06 04:37:09,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4804acd6/7c2ff6921924444386406c283945667b/FLAG74e46a343 [2021-05-06 04:37:09,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4804acd6/7c2ff6921924444386406c283945667b [2021-05-06 04:37:09,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:37:09,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:37:09,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:37:09,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:37:09,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:37:09,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:37:09" (1/1) ... [2021-05-06 04:37:09,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c15868d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:09, skipping insertion in model container [2021-05-06 04:37:09,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:37:09" (1/1) ... [2021-05-06 04:37:09,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:37:09,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:37:10,037 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/ps3-ll_unwindbound2.c[458,471] [2021-05-06 04:37:10,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:37:10,058 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:37:10,125 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/ps3-ll_unwindbound2.c[458,471] [2021-05-06 04:37:10,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:37:10,152 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:37:10,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10 WrapperNode [2021-05-06 04:37:10,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:37:10,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:37:10,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:37:10,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:37:10,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (1/1) ... [2021-05-06 04:37:10,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (1/1) ... [2021-05-06 04:37:10,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (1/1) ... [2021-05-06 04:37:10,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (1/1) ... [2021-05-06 04:37:10,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (1/1) ... [2021-05-06 04:37:10,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (1/1) ... [2021-05-06 04:37:10,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (1/1) ... [2021-05-06 04:37:10,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:37:10,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:37:10,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:37:10,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:37:10,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (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 04:37:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:37:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:37:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:37:10,270 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:37:10,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:37:10,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:37:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:37:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:37:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:37:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:37:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:37:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:37:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:37:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:37:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:37:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:37:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:37:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:37:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:37:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:37:10,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:37:10,536 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:37:10,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:37:10 BoogieIcfgContainer [2021-05-06 04:37:10,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:37:10,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:37:10,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:37:10,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:37:10,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:37:09" (1/3) ... [2021-05-06 04:37:10,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f57622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:37:10, skipping insertion in model container [2021-05-06 04:37:10,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:37:10" (2/3) ... [2021-05-06 04:37:10,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f57622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:37:10, skipping insertion in model container [2021-05-06 04:37:10,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:37:10" (3/3) ... [2021-05-06 04:37:10,558 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound2.c [2021-05-06 04:37:10,562 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:37:10,565 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:37:10,585 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:37:10,619 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:37:10,619 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:37:10,619 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:37:10,619 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:37:10,619 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:37:10,620 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:37:10,620 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:37:10,620 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:37:10,633 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 04:37:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 04:37:10,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:37:10,637 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:37:10,637 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:37:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:37:10,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-06 04:37:10,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:37:10,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762762861] [2021-05-06 04:37:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:37:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:37:10,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:37:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:37:10,860 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 04:37:10,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:37:10,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762762861] [2021-05-06 04:37:10,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762762861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:37:10,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:37:10,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:37:10,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178131730] [2021-05-06 04:37:10,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:37:10,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:37:10,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:37:10,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:37:10,877 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 04:37:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:37:10,932 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 04:37:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:37:10,933 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 04:37:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:37:10,939 INFO L225 Difference]: With dead ends: 39 [2021-05-06 04:37:10,939 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 04:37:10,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:37:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 04:37:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 04:37:10,968 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 04:37:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 04:37:10,970 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 04:37:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:37:10,970 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 04:37:10,970 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 04:37:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 04:37:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:37:10,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:37:10,971 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:37:10,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:37:10,972 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:37:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:37:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-06 04:37:10,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:37:10,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956239397] [2021-05-06 04:37:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:37:10,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:37:10,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041521043] [2021-05-06 04:37:10,987 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 04:37:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:37:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:37:11,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:37:11,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,178 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 04:37:11,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:37:11,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956239397] [2021-05-06 04:37:11,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:37:11,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041521043] [2021-05-06 04:37:11,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041521043] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:37:11,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:37:11,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:37:11,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002597176] [2021-05-06 04:37:11,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:37:11,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:37:11,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:37:11,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:37:11,181 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 04:37:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:37:11,192 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 04:37:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:37:11,192 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 04:37:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:37:11,193 INFO L225 Difference]: With dead ends: 26 [2021-05-06 04:37:11,193 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 04:37:11,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:37:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 04:37:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 04:37:11,202 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 04:37:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 04:37:11,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 04:37:11,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:37:11,203 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 04:37:11,204 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 04:37:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 04:37:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:37:11,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:37:11,204 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:37:11,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:37:11,405 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:37:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:37:11,406 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-06 04:37:11,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:37:11,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587262253] [2021-05-06 04:37:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:37:11,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:37:11,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453553544] [2021-05-06 04:37:11,417 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 04:37:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:37:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:37:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:37:11,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,544 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 04:37:11,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:37:11,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587262253] [2021-05-06 04:37:11,544 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:37:11,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453553544] [2021-05-06 04:37:11,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453553544] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:37:11,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:37:11,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:37:11,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868482390] [2021-05-06 04:37:11,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:37:11,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:37:11,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:37:11,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:37:11,546 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 04:37:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:37:11,575 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 04:37:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:37:11,576 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 04:37:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:37:11,577 INFO L225 Difference]: With dead ends: 28 [2021-05-06 04:37:11,577 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 04:37:11,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:37:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 04:37:11,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 04:37:11,582 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 04:37:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 04:37:11,582 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 04:37:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:37:11,583 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 04:37:11,583 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 04:37:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 04:37:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:37:11,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:37:11,584 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 04:37:11,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:37:11,797 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:37:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:37:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-06 04:37:11,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:37:11,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952772548] [2021-05-06 04:37:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:37:11,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:37:11,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916862983] [2021-05-06 04:37:11,807 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 04:37:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:37:11,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:37:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:37:11,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:11,928 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 04:37:11,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:37:11,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952772548] [2021-05-06 04:37:11,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:37:11,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916862983] [2021-05-06 04:37:11,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916862983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:37:11,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:37:11,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:37:11,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910329371] [2021-05-06 04:37:11,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:37:11,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:37:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:37:11,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:37:11,931 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 04:37:11,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:37:11,958 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-06 04:37:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:37:11,959 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 04:37:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:37:11,960 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:37:11,960 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 04:37:11,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:37:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 04:37:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 04:37:11,973 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 04:37:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 04:37:11,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 04:37:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:37:11,974 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 04:37:11,974 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 04:37:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 04:37:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:37:11,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:37:11,975 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:37:12,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:37:12,197 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:37:12,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:37:12,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-06 04:37:12,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:37:12,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839557501] [2021-05-06 04:37:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:37:12,207 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:37:12,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355222561] [2021-05-06 04:37:12,208 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 04:37:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:37:12,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:37:12,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:37:12,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:12,339 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 04:37:12,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:37:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839557501] [2021-05-06 04:37:12,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:37:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355222561] [2021-05-06 04:37:12,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355222561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:37:12,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:37:12,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:37:12,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105539466] [2021-05-06 04:37:12,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:37:12,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:37:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:37:12,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:37:12,347 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 04:37:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:37:12,415 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 04:37:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:37:12,416 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 04:37:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:37:12,416 INFO L225 Difference]: With dead ends: 36 [2021-05-06 04:37:12,416 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 04:37:12,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:37:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 04:37:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 04:37:12,420 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 04:37:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 04:37:12,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 04:37:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:37:12,421 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 04:37:12,421 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 04:37:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 04:37:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:37:12,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:37:12,422 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 04:37:12,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:37:12,653 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:37:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:37:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-06 04:37:12,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:37:12,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874793713] [2021-05-06 04:37:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:37:12,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:37:12,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440758828] [2021-05-06 04:37:12,663 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 04:37:12,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:37:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:37:12,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:37:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:37:12,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:37:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:37:12,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:37:12,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874793713] [2021-05-06 04:37:12,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:37:12,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440758828] [2021-05-06 04:37:12,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440758828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:37:12,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:37:12,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:37:12,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62282] [2021-05-06 04:37:12,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:37:12,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:37:12,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:37:12,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:37:12,906 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:37:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:37:13,011 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-06 04:37:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:37:13,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:37:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:37:13,014 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:37:13,014 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 04:37:13,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:37:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 04:37:13,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 04:37:13,029 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 04:37:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 04:37:13,032 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 04:37:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:37:13,032 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 04:37:13,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:37:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 04:37:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:37:13,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:37:13,034 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 04:37:13,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:37:13,253 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:37:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:37:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-06 04:37:13,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:37:13,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183800258] [2021-05-06 04:37:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:37:13,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:37:13,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976973884] [2021-05-06 04:37:13,261 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 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