/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/ps6-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:07:24,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:07:24,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:07:24,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:07:24,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:07:24,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:07:24,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:07:24,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:07:24,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:07:24,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:07:24,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:07:24,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 05:07:24,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:07:24,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:07:24,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:07:24,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:07:24,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:07:24,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:07:24,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:07:24,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:07:24,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:07:24,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:07:24,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:07:24,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:07:24,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 05:07:24,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 05:07:24,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 05:07:24,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 05:07:24,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 05:07:24,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 05:07:24,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 05:07:24,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 05:07:24,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 05:07:24,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 05:07:24,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 05:07:24,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 05:07:24,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 05:07:24,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 05:07:24,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:07:24,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:07:24,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:07:24,970 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 05:07:24,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:07:24,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:07:24,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:07:24,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:07:24,992 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:07:24,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:07:24,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:07:24,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:07:24,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:07:24,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:07:24,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:07:24,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:07:24,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:07:24,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:07:24,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:07:24,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:07:24,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:07:24,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:07:24,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:07:24,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:07:24,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:07:24,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:07:24,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:07:24,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:07:24,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:07:24,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:07:24,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:07:24,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:07:24,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:07:25,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:07:25,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:07:25,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:07:25,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:07:25,333 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:07:25,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-05-06 05:07:25,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393fa564b/8c0f501a53064d3096f0004570d198cd/FLAGe21d88701 [2021-05-06 05:07:25,802 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:07:25,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-05-06 05:07:25,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393fa564b/8c0f501a53064d3096f0004570d198cd/FLAGe21d88701 [2021-05-06 05:07:26,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393fa564b/8c0f501a53064d3096f0004570d198cd [2021-05-06 05:07:26,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:07:26,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:07:26,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:07:26,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:07:26,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:07:26,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4318137b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26, skipping insertion in model container [2021-05-06 05:07:26,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:07:26,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:07:26,382 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/ps6-ll_valuebound5.c[458,471] [2021-05-06 05:07:26,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:07:26,405 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:07:26,449 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/ps6-ll_valuebound5.c[458,471] [2021-05-06 05:07:26,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:07:26,469 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:07:26,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26 WrapperNode [2021-05-06 05:07:26,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:07:26,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:07:26,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:07:26,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:07:26,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (1/1) ... [2021-05-06 05:07:26,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:07:26,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:07:26,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:07:26,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:07:26,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (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 05:07:26,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:07:26,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:07:26,606 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:07:26,606 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:07:26,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:07:26,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:07:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:07:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:07:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:07:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:07:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 05:07:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:07:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:07:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:07:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:07:26,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:07:26,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:07:26,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:07:26,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:07:26,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:07:26,849 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:07:26,849 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:07:26,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:07:26 BoogieIcfgContainer [2021-05-06 05:07:26,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:07:26,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:07:26,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:07:26,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:07:26,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:07:26" (1/3) ... [2021-05-06 05:07:26,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f72960a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:07:26, skipping insertion in model container [2021-05-06 05:07:26,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:26" (2/3) ... [2021-05-06 05:07:26,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f72960a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:07:26, skipping insertion in model container [2021-05-06 05:07:26,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:07:26" (3/3) ... [2021-05-06 05:07:26,857 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.c [2021-05-06 05:07:26,861 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:07:26,864 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:07:26,879 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:07:26,913 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:07:26,914 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:07:26,914 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:07:26,914 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:07:26,914 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:07:26,914 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:07:26,914 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:07:26,914 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:07:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:07:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:07:26,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:26,946 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:26,947 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:26,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-06 05:07:26,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:26,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480540133] [2021-05-06 05:07:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:27,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:07:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:27,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:07:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:27,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 05:07:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:27,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:27,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480540133] [2021-05-06 05:07:27,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480540133] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:07:27,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:07:27,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:07:27,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091596279] [2021-05-06 05:07:27,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:07:27,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:07:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:07:27,312 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:07:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:27,459 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-06 05:07:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:07:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:07:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:27,467 INFO L225 Difference]: With dead ends: 51 [2021-05-06 05:07:27,467 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 05:07:27,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:07:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 05:07:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 05:07:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:07:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 05:07:27,503 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 05:07:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:27,503 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 05:07:27,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:07:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 05:07:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:07:27,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:27,505 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:27,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:07:27,506 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-06 05:07:27,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:27,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694776123] [2021-05-06 05:07:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:27,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:27,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864078058] [2021-05-06 05:07:27,530 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 05:07:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:07:27,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:27,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:27,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694776123] [2021-05-06 05:07:27,729 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864078058] [2021-05-06 05:07:27,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864078058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:07:27,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:07:27,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:07:27,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840725121] [2021-05-06 05:07:27,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:07:27,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:27,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:07:27,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:07:27,732 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 05:07:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:29,916 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-06 05:07:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:07:29,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 05:07:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:29,918 INFO L225 Difference]: With dead ends: 35 [2021-05-06 05:07:29,918 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 05:07:29,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:07:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 05:07:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 05:07:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:07:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 05:07:29,929 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 05:07:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:29,929 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 05:07:29,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 05:07:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 05:07:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 05:07:29,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:29,930 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:30,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 05:07:30,155 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-06 05:07:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:30,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025033944] [2021-05-06 05:07:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:30,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:30,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474277866] [2021-05-06 05:07:30,171 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 05:07:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:30,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:07:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:30,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:30,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:30,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025033944] [2021-05-06 05:07:30,420 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:30,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474277866] [2021-05-06 05:07:30,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474277866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:30,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:30,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:07:30,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044982444] [2021-05-06 05:07:30,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:07:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:07:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:07:30,424 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:07:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:30,517 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 05:07:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:07:30,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 05:07:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:30,520 INFO L225 Difference]: With dead ends: 42 [2021-05-06 05:07:30,521 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 05:07:30,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 05:07:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 05:07:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:07:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 05:07:30,542 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 05:07:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:30,543 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 05:07:30,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:07:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 05:07:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 05:07:30,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:30,546 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:30,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:30,754 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-06 05:07:30,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:30,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659793411] [2021-05-06 05:07:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:30,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:30,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843715537] [2021-05-06 05:07:30,771 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 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 05:07:30,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:07:30,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:30,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:07:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:31,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 05:07:31,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:31,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659793411] [2021-05-06 05:07:31,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:31,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843715537] [2021-05-06 05:07:31,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843715537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:31,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:31,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:07:31,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587861557] [2021-05-06 05:07:31,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:07:31,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:31,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:07:31,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:31,123 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:07:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:31,221 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-06 05:07:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:07:31,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 05:07:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:31,223 INFO L225 Difference]: With dead ends: 51 [2021-05-06 05:07:31,223 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 05:07:31,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:07:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 05:07:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 05:07:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:07:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 05:07:31,234 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 05:07:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:31,234 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 05:07:31,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:07:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 05:07:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 05:07:31,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:31,236 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:31,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:31,446 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:31,446 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-06 05:07:31,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:31,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334036692] [2021-05-06 05:07:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:31,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:31,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386945975] [2021-05-06 05:07:31,460 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 05:07:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 05:07:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:31,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:31,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:33,180 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 24 DAG size of output: 8 [2021-05-06 05:07:33,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:33,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:33,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:33,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 05:07:33,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334036692] [2021-05-06 05:07:33,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:33,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386945975] [2021-05-06 05:07:33,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386945975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:33,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:33,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:07:33,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635167645] [2021-05-06 05:07:33,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:07:33,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:33,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:07:33,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:07:33,230 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 05:07:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:33,386 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-06 05:07:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:07:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 05:07:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:33,388 INFO L225 Difference]: With dead ends: 54 [2021-05-06 05:07:33,389 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 05:07:33,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1507.9ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:07:33,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 05:07:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 05:07:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:07:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 05:07:33,397 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 05:07:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:33,398 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 05:07:33,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 05:07:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 05:07:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 05:07:33,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:33,399 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:33,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:33,619 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash 380668603, now seen corresponding path program 3 times [2021-05-06 05:07:33,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:33,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554744405] [2021-05-06 05:07:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:33,630 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:33,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156202205] [2021-05-06 05:07:33,630 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 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 05:07:34,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:07:34,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:34,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:07:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:34,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:34,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 05:07:34,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:34,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554744405] [2021-05-06 05:07:34,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:34,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156202205] [2021-05-06 05:07:34,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156202205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:34,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:34,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:07:34,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637794439] [2021-05-06 05:07:34,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:07:34,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:07:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:34,639 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 05:07:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:34,704 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 05:07:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:07:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-06 05:07:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:34,706 INFO L225 Difference]: With dead ends: 52 [2021-05-06 05:07:34,707 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 05:07:34,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:07:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 05:07:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 05:07:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:07:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 05:07:34,730 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 05:07:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:34,730 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 05:07:34,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 05:07:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 05:07:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 05:07:34,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:34,731 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:34,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 05:07:34,940 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 2 times [2021-05-06 05:07:34,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:34,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920497343] [2021-05-06 05:07:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:34,961 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:34,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802960543] [2021-05-06 05:07:34,962 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 05:07:35,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:07:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 05:07:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:35,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 05:07:35,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:35,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920497343] [2021-05-06 05:07:35,227 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:35,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802960543] [2021-05-06 05:07:35,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802960543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:35,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:35,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:07:35,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005618952] [2021-05-06 05:07:35,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:07:35,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:35,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:07:35,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:07:35,228 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 05:07:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:35,319 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-06 05:07:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:07:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 05:07:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:35,326 INFO L225 Difference]: With dead ends: 49 [2021-05-06 05:07:35,326 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 05:07:35,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:07:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 05:07:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 05:07:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:07:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 05:07:35,343 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 05:07:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:35,343 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 05:07:35,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 05:07:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 05:07:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 05:07:35,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:35,345 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:35,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:35,553 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 3 times [2021-05-06 05:07:35,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:35,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772496841] [2021-05-06 05:07:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:35,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:35,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243813303] [2021-05-06 05:07:35,572 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 05:07:35,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 05:07:35,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 05:07:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:35,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:35,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 05:07:36,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:36,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772496841] [2021-05-06 05:07:36,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:36,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243813303] [2021-05-06 05:07:36,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243813303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:36,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:36,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 05:07:36,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714154655] [2021-05-06 05:07:36,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:07:36,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:36,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:07:36,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:07:36,060 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 05:07:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:36,171 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-05-06 05:07:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:07:36,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 05:07:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:36,173 INFO L225 Difference]: With dead ends: 52 [2021-05-06 05:07:36,173 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 05:07:36,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:07:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 05:07:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 05:07:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:07:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 05:07:36,183 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 05:07:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:36,184 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 05:07:36,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 05:07:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 05:07:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 05:07:36,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:36,185 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:36,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:07:36,391 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 4 times [2021-05-06 05:07:36,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:36,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337373887] [2021-05-06 05:07:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:36,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:36,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799711196] [2021-05-06 05:07:36,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:36,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:07:36,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:36,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 05:07:36,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:36,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 05:07:36,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:36,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337373887] [2021-05-06 05:07:36,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:36,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799711196] [2021-05-06 05:07:36,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799711196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:36,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:36,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:07:36,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192644121] [2021-05-06 05:07:36,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:07:36,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:07:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:07:36,712 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 05:07:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:36,849 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-06 05:07:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:07:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-06 05:07:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:36,851 INFO L225 Difference]: With dead ends: 55 [2021-05-06 05:07:36,851 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 05:07:36,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:07:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 05:07:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 05:07:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:07:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 05:07:36,859 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 05:07:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:36,859 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 05:07:36,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 05:07:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 05:07:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 05:07:36,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:36,860 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:37,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 05:07:37,086 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 5 times [2021-05-06 05:07:37,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:37,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919405946] [2021-05-06 05:07:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:37,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:37,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546582189] [2021-05-06 05:07:37,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:37,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 05:07:37,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:37,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 05:07:37,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:37,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:37,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 05:07:38,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:38,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919405946] [2021-05-06 05:07:38,020 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:38,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546582189] [2021-05-06 05:07:38,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546582189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:38,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:38,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 05:07:38,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161200235] [2021-05-06 05:07:38,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 05:07:38,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:38,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 05:07:38,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:07:38,021 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 05:07:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:38,185 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-06 05:07:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 05:07:38,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-06 05:07:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:38,187 INFO L225 Difference]: With dead ends: 58 [2021-05-06 05:07:38,187 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 05:07:38,187 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:07:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 05:07:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 05:07:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:07:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-06 05:07:38,196 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-06 05:07:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:38,196 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-06 05:07:38,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 05:07:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-06 05:07:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 05:07:38,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:38,204 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:38,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:38,411 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 6 times [2021-05-06 05:07:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:38,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941698941] [2021-05-06 05:07:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:38,420 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:38,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112268793] [2021-05-06 05:07:38,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:38,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 05:07:38,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:07:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:38,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 123 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 05:07:38,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:38,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941698941] [2021-05-06 05:07:38,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:38,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112268793] [2021-05-06 05:07:38,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112268793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:38,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:38,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 05:07:38,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554675889] [2021-05-06 05:07:38,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 05:07:38,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 05:07:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:07:38,928 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 05:07:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:39,011 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-05-06 05:07:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 05:07:39,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2021-05-06 05:07:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:39,012 INFO L225 Difference]: With dead ends: 58 [2021-05-06 05:07:39,012 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:07:39,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:07:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:07:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:07:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:07:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:07:39,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-05-06 05:07:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:39,013 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:07:39,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 05:07:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:07:39,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:07:39,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 05:07:39,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:07:39,603 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-05-06 05:07:39,865 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-05-06 05:07:40,034 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-05-06 05:07:40,297 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-05-06 05:07:40,301 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 05:07:40,301 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 05:07:40,301 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 05:07:40,301 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:07:40,301 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 05:07:40,301 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:07:40,301 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:07:40,302 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 05:07:40,302 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:07:40,302 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:07:40,302 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-06 05:07:40,302 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-06 05:07:40,302 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-06 05:07:40,302 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-06 05:07:40,302 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 42) the Hoare annotation is: true [2021-05-06 05:07:40,302 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (let ((.cse2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse2 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2)))) (.cse1 (<= main_~k~0 5))) (or (and .cse0 (= main_~y~0 2) (< 1 main_~k~0) .cse1 (= main_~c~0 2)) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1) (and (<= main_~c~0 5) .cse0 (= 5 main_~y~0) (<= 5 main_~c~0) (< 4 main_~k~0) .cse1) (and (<= main_~c~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4) .cse1 (<= 4 main_~c~0)) (and .cse0 (< 2 main_~k~0) .cse1 (= main_~c~0 3) (= main_~y~0 3)) (and (= main_~c~0 1) (= main_~y~0 1) (= main_~x~0 .cse2) (< 0 main_~k~0) .cse1)))) [2021-05-06 05:07:40,303 INFO L198 CegarLoopUtils]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2021-05-06 05:07:40,303 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse2 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2)))) (.cse1 (<= main_~k~0 5))) (or (and .cse0 (= main_~y~0 2) (< 1 main_~k~0) .cse1 (= main_~c~0 2)) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1) (and (<= main_~c~0 5) .cse0 (= 5 main_~y~0) (<= 5 main_~c~0) (< 4 main_~k~0) .cse1) (and (<= main_~c~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4) .cse1 (<= 4 main_~c~0)) (and .cse0 (< 2 main_~k~0) .cse1 (= main_~c~0 3) (= main_~y~0 3)) (and (= main_~c~0 1) (= main_~y~0 1) (= main_~x~0 .cse2) (< 0 main_~k~0) .cse1)))) [2021-05-06 05:07:40,303 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse1 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse1 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))))) (or (and (<= main_~c~0 5) .cse0 (= 5 main_~y~0) (< 4 main_~k~0) (<= main_~k~0 5)) (and (<= main_~k~0 1) (= main_~y~0 1) (= main_~x~0 .cse1) (<= main_~c~0 1) (< 0 main_~k~0)) (and (<= main_~c~0 4) .cse0 (<= main_~k~0 4) (< 3 main_~k~0) (= main_~y~0 4)) (and .cse0 (<= main_~c~0 3) (< 2 main_~k~0) (<= main_~k~0 3) (= main_~y~0 3)) (and (= main_~y~0 0) (= main_~x~0 0)) (and .cse0 (<= main_~c~0 2) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2))))) [2021-05-06 05:07:40,303 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 42) no Hoare annotation was computed. [2021-05-06 05:07:40,303 INFO L198 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2021-05-06 05:07:40,303 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-06 05:07:40,303 INFO L194 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (<= 0 main_~k~0) (<= main_~k~0 5)) [2021-05-06 05:07:40,303 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 42) no Hoare annotation was computed. [2021-05-06 05:07:40,304 INFO L198 CegarLoopUtils]: For program point L40(line 40) no Hoare annotation was computed. [2021-05-06 05:07:40,304 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse1 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse1 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))))) (or (and (<= main_~c~0 4) .cse0 (<= main_~k~0 4) (< 3 main_~k~0) (= main_~y~0 4)) (and (<= main_~c~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0) (<= main_~k~0 5)) (and (<= .cse1 main_~x~0) (<= main_~k~0 1) (= main_~y~0 1) (<= main_~c~0 1) (< 0 main_~k~0)) (and .cse0 (<= main_~c~0 3) (< 2 main_~k~0) (<= main_~k~0 3) (= main_~y~0 3)) (and (= main_~y~0 0) (= main_~x~0 0)) (and .cse0 (<= main_~c~0 2) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2))))) [2021-05-06 05:07:40,304 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-06 05:07:40,304 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-06 05:07:40,304 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-06 05:07:40,304 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-06 05:07:40,304 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-06 05:07:40,304 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-06 05:07:40,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:07:40 BoogieIcfgContainer [2021-05-06 05:07:40,318 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:07:40,319 INFO L168 Benchmark]: Toolchain (without parser) took 14104.71 ms. Allocated memory was 313.5 MB in the beginning and 404.8 MB in the end (delta: 91.2 MB). Free memory was 276.8 MB in the beginning and 347.1 MB in the end (delta: -70.3 MB). Peak memory consumption was 220.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:40,319 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 313.5 MB. Free memory was 293.0 MB in the beginning and 292.9 MB in the end (delta: 73.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:07:40,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.14 ms. Allocated memory is still 313.5 MB. Free memory was 276.6 MB in the beginning and 296.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 8.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:40,319 INFO L168 Benchmark]: Boogie Preprocessor took 50.23 ms. Allocated memory is still 313.5 MB. Free memory was 296.0 MB in the beginning and 294.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:40,320 INFO L168 Benchmark]: RCFGBuilder took 328.20 ms. Allocated memory is still 313.5 MB. Free memory was 294.4 MB in the beginning and 278.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:40,320 INFO L168 Benchmark]: TraceAbstraction took 13466.83 ms. Allocated memory was 313.5 MB in the beginning and 404.8 MB in the end (delta: 91.2 MB). Free memory was 277.7 MB in the beginning and 347.1 MB in the end (delta: -69.4 MB). Peak memory consumption was 220.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:40,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 313.5 MB. Free memory was 293.0 MB in the beginning and 292.9 MB in the end (delta: 73.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.14 ms. Allocated memory is still 313.5 MB. Free memory was 276.6 MB in the beginning and 296.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 8.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.23 ms. Allocated memory is still 313.5 MB. Free memory was 296.0 MB in the beginning and 294.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.20 ms. Allocated memory is still 313.5 MB. Free memory was 294.4 MB in the beginning and 278.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13466.83 ms. Allocated memory was 313.5 MB in the beginning and 404.8 MB in the end (delta: 91.2 MB). Free memory was 277.7 MB in the beginning and 347.1 MB in the end (delta: -69.4 MB). Peak memory consumption was 220.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12332.9ms, OverallIterations: 11, TraceHistogramMax: 9, EmptinessCheckTime: 34.9ms, AutomataDifference: 3400.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1071.5ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 334 SDtfs, 70 SDslu, 1542 SDs, 0 SdLazy, 712 SolverSat, 35 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2755.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 492 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2130.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=10, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 131.5ms AutomataMinimizationTime, 11 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 37 PreInvPairs, 62 NumberOfFragments, 926 HoareAnnotationTreeSize, 37 FomulaSimplifications, 2038 FormulaSimplificationTreeSizeReduction, 122.6ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 1157 FormulaSimplificationTreeSizeReductionInter, 940.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 102.2ms SsaConstructionTime, 2272.3ms SatisfiabilityAnalysisTime, 3528.7ms InterpolantComputationTime, 497 NumberOfCodeBlocks, 474 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 486 ConstructedInterpolants, 0 QuantifiedInterpolants, 1511 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1588 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 543/662 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2 && y == 2) && 1 < k) && k <= 5) && c == 2) || ((((c == 0 && 0 <= k) && y == 0) && x == 0) && k <= 5)) || (((((c <= 5 && x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2) && 5 == y) && 5 <= c) && 4 < k) && k <= 5)) || (((((c <= 4 && x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2) && 3 < k) && y == 4) && k <= 5) && 4 <= c)) || ((((x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2 && 2 < k) && k <= 5) && c == 3) && y == 3)) || ((((c == 1 && y == 1) && x == y * y * y * y * y) && 0 < k) && k <= 5) RESULT: Ultimate proved your program to be correct! Received shutdown request...