/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/egcd2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:51:38,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:51:38,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:51:38,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 14:51:38,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 14:51:38,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 14:51:38,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 14:51:38,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 14:51:38,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 14:51:38,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 14:51:38,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 14:51:38,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 14:51:38,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:51:38,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:51:38,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:51:38,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:51:38,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:51:38,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:51:38,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:51:38,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:51:38,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:51:38,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:51:38,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:51:38,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:51:38,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 14:51:38,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 14:51:38,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 14:51:38,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 14:51:38,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 14:51:38,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 14:51:38,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 14:51:38,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 14:51:38,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 14:51:38,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 14:51:39,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 14:51:39,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 14:51:39,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 14:51:39,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 14:51:39,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:51:39,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:51:39,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:51:39,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:51:39,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:51:39,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:51:39,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:51:39,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:51:39,021 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:51:39,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:51:39,022 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:51:39,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:51:39,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:51:39,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:51:39,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:51:39,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:51:39,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:51:39,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:51:39,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:51:39,023 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:51:39,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:51:39,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:51:39,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:51:39,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:51:39,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:51:39,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:51:39,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:51:39,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:51:39,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:51:39,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:51:39,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:51:39,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:51:39,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:51:39,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:51:39,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:51:39,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:51:39,257 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:51:39,257 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:51:39,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2021-05-02 14:51:39,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172d066e3/69879b56707d4a4f97045cda5a0ac034/FLAG7ec1f15c2 [2021-05-02 14:51:39,642 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:51:39,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2021-05-02 14:51:39,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172d066e3/69879b56707d4a4f97045cda5a0ac034/FLAG7ec1f15c2 [2021-05-02 14:51:40,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172d066e3/69879b56707d4a4f97045cda5a0ac034 [2021-05-02 14:51:40,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:51:40,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:51:40,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:51:40,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:51:40,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:51:40,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c67db6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40, skipping insertion in model container [2021-05-02 14:51:40,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:51:40,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:51:40,179 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/egcd2-ll_unwindbound5.c[490,503] [2021-05-02 14:51:40,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:51:40,213 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:51:40,223 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/egcd2-ll_unwindbound5.c[490,503] [2021-05-02 14:51:40,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:51:40,264 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:51:40,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40 WrapperNode [2021-05-02 14:51:40,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:51:40,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:51:40,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:51:40,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:51:40,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (1/1) ... [2021-05-02 14:51:40,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:51:40,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:51:40,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:51:40,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:51:40,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:51:40,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:51:40,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:51:40,485 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:51:40,485 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:51:40,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:51:40,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:51:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:51:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:51:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:51:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:51:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:51:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:51:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:51:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:51:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:51:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:51:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:51:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:51:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:51:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:51:40,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:51:40,779 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:51:40,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:51:40 BoogieIcfgContainer [2021-05-02 14:51:40,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:51:40,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:51:40,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:51:40,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:51:40,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:51:40" (1/3) ... [2021-05-02 14:51:40,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52039cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:51:40, skipping insertion in model container [2021-05-02 14:51:40,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:51:40" (2/3) ... [2021-05-02 14:51:40,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52039cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:51:40, skipping insertion in model container [2021-05-02 14:51:40,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:51:40" (3/3) ... [2021-05-02 14:51:40,806 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2021-05-02 14:51:40,810 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:51:40,812 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:51:40,823 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:51:40,866 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:51:40,866 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:51:40,866 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:51:40,866 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:51:40,867 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:51:40,867 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:51:40,867 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:51:40,867 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:51:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:51:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 14:51:40,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:40,884 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:40,884 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-02 14:51:40,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:40,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045693031] [2021-05-02 14:51:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:41,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:51:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:41,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:51:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:41,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:51:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:41,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:51:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:41,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:51:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:51:41,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045693031] [2021-05-02 14:51:41,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045693031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:51:41,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:51:41,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:51:41,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594280815] [2021-05-02 14:51:41,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:51:41,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:51:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:51:41,172 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:41,332 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-02 14:51:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:51:41,334 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 14:51:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:41,339 INFO L225 Difference]: With dead ends: 72 [2021-05-02 14:51:41,340 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:51:41,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:51:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:51:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 14:51:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:51:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-02 14:51:41,388 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-02 14:51:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:41,388 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-02 14:51:41,389 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-02 14:51:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:51:41,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:41,391 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:41,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:51:41,391 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-02 14:51:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:41,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065352266] [2021-05-02 14:51:41,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:41,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:41,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347379389] [2021-05-02 14:51:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:51:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:41,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:41,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:41,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:41,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:41,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:51:41,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065352266] [2021-05-02 14:51:41,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347379389] [2021-05-02 14:51:41,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347379389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:51:41,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:51:41,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:51:41,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860856415] [2021-05-02 14:51:41,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:51:41,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:41,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:51:41,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:51:41,621 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:41,637 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-02 14:51:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:51:41,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 14:51:41,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:41,638 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:51:41,638 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 14:51:41,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:51:41,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 14:51:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 14:51:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:51:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-02 14:51:41,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-02 14:51:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:41,646 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-02 14:51:41,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:41,646 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-02 14:51:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:51:41,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:41,647 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:41,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:51:41,857 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:41,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:41,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2021-05-02 14:51:41,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:41,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826108397] [2021-05-02 14:51:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:41,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:41,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932108585] [2021-05-02 14:51:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:51:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:42,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:51:42,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826108397] [2021-05-02 14:51:42,074 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932108585] [2021-05-02 14:51:42,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932108585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:42,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:42,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:51:42,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395256831] [2021-05-02 14:51:42,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:51:42,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:51:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:51:42,075 INFO L87 Difference]: Start difference. First operand 36 states and 47 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:42,180 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-02 14:51:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:51:42,181 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 14:51:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:42,184 INFO L225 Difference]: With dead ends: 53 [2021-05-02 14:51:42,184 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 14:51:42,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 14:51:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-02 14:51:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:51:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:51:42,207 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-02 14:51:42,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:42,207 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:51:42,208 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:51:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:51:42,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:42,208 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:42,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:42,431 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:42,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2021-05-02 14:51:42,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:42,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059888152] [2021-05-02 14:51:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:42,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:42,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66763792] [2021-05-02 14:51:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:51:42,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:42,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:51:42,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:42,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059888152] [2021-05-02 14:51:42,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:42,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66763792] [2021-05-02 14:51:42,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66763792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:42,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:42,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:51:42,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78894926] [2021-05-02 14:51:42,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:51:42,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:42,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:51:42,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:42,598 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:42,711 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-05-02 14:51:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:51:42,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 14:51:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:42,712 INFO L225 Difference]: With dead ends: 59 [2021-05-02 14:51:42,712 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 14:51:42,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:51:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 14:51:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-02 14:51:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:51:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-02 14:51:42,718 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-02 14:51:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:42,719 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-02 14:51:42,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-02 14:51:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:51:42,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:42,720 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:42,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:42,936 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2021-05-02 14:51:42,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:42,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332292216] [2021-05-02 14:51:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:42,944 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:42,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612661017] [2021-05-02 14:51:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:43,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:51:43,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:43,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:51:43,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:43,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332292216] [2021-05-02 14:51:43,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:43,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612661017] [2021-05-02 14:51:43,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612661017] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:51:43,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:51:43,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:51:43,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603843265] [2021-05-02 14:51:43,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:51:43,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:51:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:51:43,106 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:43,138 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-02 14:51:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:51:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 14:51:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:43,140 INFO L225 Difference]: With dead ends: 63 [2021-05-02 14:51:43,140 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:51:43,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:51:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:51:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 14:51:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:51:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-02 14:51:43,146 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-02 14:51:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:43,146 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-02 14:51:43,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:51:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-02 14:51:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:51:43,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:43,147 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:43,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:43,363 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:43,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2021-05-02 14:51:43,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:43,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954594084] [2021-05-02 14:51:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:43,371 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:43,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275069937] [2021-05-02 14:51:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:43,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:51:43,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:43,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:51:43,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:43,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954594084] [2021-05-02 14:51:43,543 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:43,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275069937] [2021-05-02 14:51:43,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275069937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:43,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:43,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:51:43,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188962816] [2021-05-02 14:51:43,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:51:43,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:43,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:51:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:43,544 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:51:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:43,632 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-02 14:51:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:51:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 14:51:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:43,634 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:51:43,634 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 14:51:43,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:51:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 14:51:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 14:51:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:51:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-02 14:51:43,641 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-02 14:51:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:43,641 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-02 14:51:43,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:51:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-02 14:51:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 14:51:43,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:43,642 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:43,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:51:43,859 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2021-05-02 14:51:43,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:43,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937644853] [2021-05-02 14:51:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:43,867 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:43,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210831721] [2021-05-02 14:51:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:43,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:51:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:43,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:43,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 14:51:44,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:44,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937644853] [2021-05-02 14:51:44,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:44,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210831721] [2021-05-02 14:51:44,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210831721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:44,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:44,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:51:44,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528662435] [2021-05-02 14:51:44,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:51:44,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:44,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:51:44,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:44,063 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:51:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:44,147 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-05-02 14:51:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:51:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 14:51:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:44,148 INFO L225 Difference]: With dead ends: 62 [2021-05-02 14:51:44,148 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 14:51:44,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:51:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 14:51:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 14:51:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:51:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-02 14:51:44,154 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-02 14:51:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:44,155 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-02 14:51:44,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:51:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-02 14:51:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:51:44,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:44,156 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:44,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:44,374 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:44,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:44,375 INFO L82 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2021-05-02 14:51:44,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:44,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312463703] [2021-05-02 14:51:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:44,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:44,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419315255] [2021-05-02 14:51:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:51:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:44,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 14:51:44,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:44,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312463703] [2021-05-02 14:51:44,573 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:44,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419315255] [2021-05-02 14:51:44,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419315255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:44,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:44,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:51:44,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894247823] [2021-05-02 14:51:44,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:51:44,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:44,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:51:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:51:44,574 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 14:51:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:46,778 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-05-02 14:51:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:51:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 14:51:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:46,779 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:51:46,779 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:51:46,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:51:46,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:51:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 14:51:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:51:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-02 14:51:46,786 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-02 14:51:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:46,786 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-02 14:51:46,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 14:51:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-02 14:51:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 14:51:46,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:46,787 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:47,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:47,004 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2021-05-02 14:51:47,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:47,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248958515] [2021-05-02 14:51:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:47,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:47,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013674137] [2021-05-02 14:51:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:51:47,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:47,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 14:51:47,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248958515] [2021-05-02 14:51:47,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013674137] [2021-05-02 14:51:47,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013674137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:47,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:47,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:51:47,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563906217] [2021-05-02 14:51:47,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:51:47,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:47,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:51:47,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:47,179 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:51:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:47,300 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-05-02 14:51:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:51:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-02 14:51:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:47,302 INFO L225 Difference]: With dead ends: 96 [2021-05-02 14:51:47,302 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 14:51:47,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:51:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 14:51:47,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-02 14:51:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:51:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-02 14:51:47,312 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-02 14:51:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:47,312 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-02 14:51:47,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:51:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-02 14:51:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:51:47,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:47,313 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:47,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:51:47,534 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2021-05-02 14:51:47,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:47,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726718164] [2021-05-02 14:51:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:47,550 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:47,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759221112] [2021-05-02 14:51:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:47,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:51:47,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:47,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:51:47,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:47,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726718164] [2021-05-02 14:51:47,703 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:47,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759221112] [2021-05-02 14:51:47,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759221112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:47,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:47,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:51:47,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102691016] [2021-05-02 14:51:47,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:51:47,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:51:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:51:47,705 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:51:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:47,778 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2021-05-02 14:51:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:51:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-02 14:51:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:47,780 INFO L225 Difference]: With dead ends: 107 [2021-05-02 14:51:47,780 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 14:51:47,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 14:51:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 14:51:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:51:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-02 14:51:47,802 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-02 14:51:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:47,802 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-02 14:51:47,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:51:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-02 14:51:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:51:47,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:47,803 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:48,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:48,017 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:48,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2021-05-02 14:51:48,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:48,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449473075] [2021-05-02 14:51:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:48,023 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:48,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221745506] [2021-05-02 14:51:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:48,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:51:48,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:48,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 14:51:48,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:48,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449473075] [2021-05-02 14:51:48,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:48,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221745506] [2021-05-02 14:51:48,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221745506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:48,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:48,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:51:48,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52324489] [2021-05-02 14:51:48,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:51:48,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:48,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:51:48,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:48,185 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:51:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:48,352 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2021-05-02 14:51:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:48,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:51:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:48,354 INFO L225 Difference]: With dead ends: 178 [2021-05-02 14:51:48,354 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 14:51:48,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 14:51:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-02 14:51:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 14:51:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-02 14:51:48,366 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-02 14:51:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:48,366 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-02 14:51:48,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:51:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-02 14:51:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 14:51:48,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:48,367 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:48,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:48,590 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:48,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2021-05-02 14:51:48,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:48,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869004636] [2021-05-02 14:51:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:48,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:48,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704567339] [2021-05-02 14:51:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:51:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:48,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:51:48,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:48,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869004636] [2021-05-02 14:51:48,752 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:48,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704567339] [2021-05-02 14:51:48,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704567339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:48,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:48,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:51:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861153333] [2021-05-02 14:51:48,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:51:48,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:48,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:51:48,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:51:48,756 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:51:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:48,815 INFO L93 Difference]: Finished difference Result 175 states and 244 transitions. [2021-05-02 14:51:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:51:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-02 14:51:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:48,819 INFO L225 Difference]: With dead ends: 175 [2021-05-02 14:51:48,819 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 14:51:48,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 14:51:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-02 14:51:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 14:51:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-02 14:51:48,840 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-02 14:51:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:48,840 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-02 14:51:48,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:51:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-02 14:51:48,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 14:51:48,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:48,841 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:49,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:51:49,058 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:49,058 INFO L82 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2021-05-02 14:51:49,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:49,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273723660] [2021-05-02 14:51:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:49,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:49,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077902468] [2021-05-02 14:51:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:49,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:51:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:49,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:51:49,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:49,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273723660] [2021-05-02 14:51:49,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:49,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077902468] [2021-05-02 14:51:49,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077902468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:49,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:49,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:51:49,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803988699] [2021-05-02 14:51:49,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:51:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:51:49,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:49,264 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:51:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:49,339 INFO L93 Difference]: Finished difference Result 245 states and 345 transitions. [2021-05-02 14:51:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:51:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-02 14:51:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:49,341 INFO L225 Difference]: With dead ends: 245 [2021-05-02 14:51:49,341 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 14:51:49,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 14:51:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-02 14:51:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 14:51:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-02 14:51:49,351 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-02 14:51:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:49,352 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-02 14:51:49,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:51:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-02 14:51:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 14:51:49,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:49,352 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:49,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:51:49,571 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2021-05-02 14:51:49,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:49,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662132875] [2021-05-02 14:51:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:49,577 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:49,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055754460] [2021-05-02 14:51:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:49,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:51:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:49,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 14:51:49,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:49,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662132875] [2021-05-02 14:51:49,782 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:49,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055754460] [2021-05-02 14:51:49,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055754460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:49,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:49,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:51:49,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909564958] [2021-05-02 14:51:49,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:51:49,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:51:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:51:49,783 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:51:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:50,000 INFO L93 Difference]: Finished difference Result 202 states and 269 transitions. [2021-05-02 14:51:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 14:51:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:50,003 INFO L225 Difference]: With dead ends: 202 [2021-05-02 14:51:50,003 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 14:51:50,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 14:51:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-05-02 14:51:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 126 states have (on average 1.2619047619047619) internal successors, (159), 133 states have internal predecessors, (159), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:51:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 262 transitions. [2021-05-02 14:51:50,044 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 262 transitions. Word has length 68 [2021-05-02 14:51:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:50,044 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 262 transitions. [2021-05-02 14:51:50,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:51:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 262 transitions. [2021-05-02 14:51:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 14:51:50,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:50,045 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:50,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:51:50,246 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:50,246 INFO L82 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2021-05-02 14:51:50,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:50,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676109013] [2021-05-02 14:51:50,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:50,252 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:50,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568390444] [2021-05-02 14:51:50,252 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:50,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:50,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:50,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:51:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:50,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:51:50,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:50,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676109013] [2021-05-02 14:51:50,537 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:50,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568390444] [2021-05-02 14:51:50,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568390444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:50,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:50,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:51:50,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951865240] [2021-05-02 14:51:50,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:51:50,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:50,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:51:50,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:51:50,538 INFO L87 Difference]: Start difference. First operand 196 states and 262 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:51:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:50,729 INFO L93 Difference]: Finished difference Result 224 states and 301 transitions. [2021-05-02 14:51:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:50,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-02 14:51:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:50,730 INFO L225 Difference]: With dead ends: 224 [2021-05-02 14:51:50,730 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 14:51:50,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:51:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 14:51:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2021-05-02 14:51:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 146 states have internal predecessors, (175), 62 states have call successors, (62), 19 states have call predecessors, (62), 18 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:51:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 296 transitions. [2021-05-02 14:51:50,745 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 296 transitions. Word has length 73 [2021-05-02 14:51:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:50,745 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 296 transitions. [2021-05-02 14:51:50,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:51:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 296 transitions. [2021-05-02 14:51:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 14:51:50,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:50,746 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:50,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:50,962 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:50,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:50,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2021-05-02 14:51:50,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:50,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224040807] [2021-05-02 14:51:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:50,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:50,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620690446] [2021-05-02 14:51:50,969 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:51,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:51:51,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 14:51:51,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:51,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 14:51:51,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:51,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224040807] [2021-05-02 14:51:51,448 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:51,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620690446] [2021-05-02 14:51:51,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620690446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:51,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:51,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:51:51,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038499847] [2021-05-02 14:51:51,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:51:51,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:51:51,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:51,450 INFO L87 Difference]: Start difference. First operand 219 states and 296 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:51:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:51,793 INFO L93 Difference]: Finished difference Result 228 states and 304 transitions. [2021-05-02 14:51:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:51:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-02 14:51:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:51,794 INFO L225 Difference]: With dead ends: 228 [2021-05-02 14:51:51,794 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 14:51:51,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:51:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 14:51:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2021-05-02 14:51:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 149 states have internal predecessors, (178), 62 states have call successors, (62), 20 states have call predecessors, (62), 19 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:51:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 299 transitions. [2021-05-02 14:51:51,809 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 299 transitions. Word has length 78 [2021-05-02 14:51:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:51,809 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 299 transitions. [2021-05-02 14:51:51,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:51:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 299 transitions. [2021-05-02 14:51:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 14:51:51,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:51,810 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:52,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:51:52,025 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 2 times [2021-05-02 14:51:52,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:52,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093626365] [2021-05-02 14:51:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:52,032 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:52,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187706060] [2021-05-02 14:51:52,032 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:52,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:52,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:52,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 14:51:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:52,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 14:51:52,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:52,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093626365] [2021-05-02 14:51:52,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:52,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187706060] [2021-05-02 14:51:52,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187706060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:52,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:52,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:51:52,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243436587] [2021-05-02 14:51:52,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:51:52,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:51:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:52,369 INFO L87 Difference]: Start difference. First operand 223 states and 299 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:51:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:52,702 INFO L93 Difference]: Finished difference Result 237 states and 317 transitions. [2021-05-02 14:51:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:51:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 82 [2021-05-02 14:51:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:52,704 INFO L225 Difference]: With dead ends: 237 [2021-05-02 14:51:52,704 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 14:51:52,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:51:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 14:51:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2021-05-02 14:51:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 144 states have (on average 1.2569444444444444) internal successors, (181), 153 states have internal predecessors, (181), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:51:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 304 transitions. [2021-05-02 14:51:52,718 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 304 transitions. Word has length 82 [2021-05-02 14:51:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:52,718 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 304 transitions. [2021-05-02 14:51:52,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:51:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 304 transitions. [2021-05-02 14:51:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 14:51:52,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:52,719 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:52,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:52,925 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2021-05-02 14:51:52,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:52,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827171980] [2021-05-02 14:51:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:52,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:52,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182312757] [2021-05-02 14:51:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:51:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:53,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:51:53,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:53,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827171980] [2021-05-02 14:51:53,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:53,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182312757] [2021-05-02 14:51:53,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182312757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:53,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:53,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:51:53,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619833002] [2021-05-02 14:51:53,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:51:53,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:53,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:51:53,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:53,170 INFO L87 Difference]: Start difference. First operand 228 states and 304 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:53,249 INFO L93 Difference]: Finished difference Result 238 states and 314 transitions. [2021-05-02 14:51:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:51:53,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-02 14:51:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:53,251 INFO L225 Difference]: With dead ends: 238 [2021-05-02 14:51:53,251 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 14:51:53,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 14:51:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-05-02 14:51:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 147 states have (on average 1.251700680272109) internal successors, (184), 156 states have internal predecessors, (184), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:51:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 307 transitions. [2021-05-02 14:51:53,268 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 307 transitions. Word has length 83 [2021-05-02 14:51:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:53,269 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 307 transitions. [2021-05-02 14:51:53,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 307 transitions. [2021-05-02 14:51:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 14:51:53,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:53,270 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:53,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:51:53,486 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:53,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2021-05-02 14:51:53,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:53,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122532643] [2021-05-02 14:51:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:53,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:53,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178071324] [2021-05-02 14:51:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:51:53,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 14:51:53,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:53,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122532643] [2021-05-02 14:51:53,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:53,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178071324] [2021-05-02 14:51:53,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178071324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:53,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:53,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:51:53,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021955927] [2021-05-02 14:51:53,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:51:53,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:51:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:51:53,873 INFO L87 Difference]: Start difference. First operand 231 states and 307 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:51:54,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:54,301 INFO L93 Difference]: Finished difference Result 263 states and 352 transitions. [2021-05-02 14:51:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:51:54,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 84 [2021-05-02 14:51:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:54,305 INFO L225 Difference]: With dead ends: 263 [2021-05-02 14:51:54,305 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 14:51:54,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:51:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 14:51:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-05-02 14:51:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 162 states have (on average 1.2592592592592593) internal successors, (204), 172 states have internal predecessors, (204), 72 states have call successors, (72), 23 states have call predecessors, (72), 22 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:51:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 345 transitions. [2021-05-02 14:51:54,321 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 345 transitions. Word has length 84 [2021-05-02 14:51:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:54,321 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 345 transitions. [2021-05-02 14:51:54,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:51:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 345 transitions. [2021-05-02 14:51:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:51:54,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:54,322 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:54,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 14:51:54,539 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:54,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 2 times [2021-05-02 14:51:54,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:54,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545095200] [2021-05-02 14:51:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:54,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:54,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660668310] [2021-05-02 14:51:54,568 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:54,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:54,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:54,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:51:54,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:54,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:51:54,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:54,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545095200] [2021-05-02 14:51:54,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:54,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660668310] [2021-05-02 14:51:54,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660668310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:54,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:54,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:51:54,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766290285] [2021-05-02 14:51:54,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:51:54,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:54,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:51:54,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:54,761 INFO L87 Difference]: Start difference. First operand 257 states and 345 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:54,857 INFO L93 Difference]: Finished difference Result 299 states and 386 transitions. [2021-05-02 14:51:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-02 14:51:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:54,859 INFO L225 Difference]: With dead ends: 299 [2021-05-02 14:51:54,859 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 14:51:54,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:51:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 14:51:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-02 14:51:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 196 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:51:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 377 transitions. [2021-05-02 14:51:54,876 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 377 transitions. Word has length 87 [2021-05-02 14:51:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:54,877 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 377 transitions. [2021-05-02 14:51:54,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 377 transitions. [2021-05-02 14:51:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:51:54,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:54,877 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:55,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:51:55,092 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:55,092 INFO L82 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2021-05-02 14:51:55,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:55,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705873425] [2021-05-02 14:51:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:55,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:55,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344315972] [2021-05-02 14:51:55,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:51:55,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:55,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:51:55,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:55,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705873425] [2021-05-02 14:51:55,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:55,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344315972] [2021-05-02 14:51:55,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344315972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:55,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:55,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:51:55,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429950946] [2021-05-02 14:51:55,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:51:55,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:55,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:51:55,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:55,326 INFO L87 Difference]: Start difference. First operand 291 states and 377 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:55,427 INFO L93 Difference]: Finished difference Result 398 states and 543 transitions. [2021-05-02 14:51:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-02 14:51:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:55,429 INFO L225 Difference]: With dead ends: 398 [2021-05-02 14:51:55,429 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 14:51:55,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:51:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 14:51:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-05-02 14:51:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 189 states have (on average 1.216931216931217) internal successors, (230), 198 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:51:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 377 transitions. [2021-05-02 14:51:55,444 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 377 transitions. Word has length 89 [2021-05-02 14:51:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:55,445 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 377 transitions. [2021-05-02 14:51:55,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 377 transitions. [2021-05-02 14:51:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 14:51:55,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:55,446 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:55,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:51:55,662 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:55,663 INFO L82 PathProgramCache]: Analyzing trace with hash 325787368, now seen corresponding path program 2 times [2021-05-02 14:51:55,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:55,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035237117] [2021-05-02 14:51:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:55,673 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:55,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945074002] [2021-05-02 14:51:55,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:55,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:51:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:55,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-02 14:51:55,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035237117] [2021-05-02 14:51:55,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945074002] [2021-05-02 14:51:55,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945074002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:51:55,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:51:55,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:51:55,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913940980] [2021-05-02 14:51:55,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:51:55,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:51:55,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:51:55,836 INFO L87 Difference]: Start difference. First operand 293 states and 377 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 14:51:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:55,896 INFO L93 Difference]: Finished difference Result 451 states and 628 transitions. [2021-05-02 14:51:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:51:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-02 14:51:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:55,898 INFO L225 Difference]: With dead ends: 451 [2021-05-02 14:51:55,898 INFO L226 Difference]: Without dead ends: 343 [2021-05-02 14:51:55,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-02 14:51:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 310. [2021-05-02 14:51:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 200 states have (on average 1.225) internal successors, (245), 208 states have internal predecessors, (245), 81 states have call successors, (81), 29 states have call predecessors, (81), 28 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:51:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 404 transitions. [2021-05-02 14:51:55,916 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 404 transitions. Word has length 93 [2021-05-02 14:51:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:55,916 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 404 transitions. [2021-05-02 14:51:55,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 14:51:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 404 transitions. [2021-05-02 14:51:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 14:51:55,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:55,917 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:56,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:51:56,133 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:56,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2021-05-02 14:51:56,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:56,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689729634] [2021-05-02 14:51:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:56,149 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:56,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146757639] [2021-05-02 14:51:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:56,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 14:51:56,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:56,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 14:51:56,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689729634] [2021-05-02 14:51:56,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146757639] [2021-05-02 14:51:56,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146757639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:56,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:56,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:51:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844865786] [2021-05-02 14:51:56,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:51:56,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:51:56,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:51:56,707 INFO L87 Difference]: Start difference. First operand 310 states and 404 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:52:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:01,219 INFO L93 Difference]: Finished difference Result 320 states and 413 transitions. [2021-05-02 14:52:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:52:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 101 [2021-05-02 14:52:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:01,221 INFO L225 Difference]: With dead ends: 320 [2021-05-02 14:52:01,221 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 14:52:01,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:52:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 14:52:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2021-05-02 14:52:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 203 states have (on average 1.2216748768472907) internal successors, (248), 211 states have internal predecessors, (248), 81 states have call successors, (81), 30 states have call predecessors, (81), 29 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:52:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 407 transitions. [2021-05-02 14:52:01,239 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 407 transitions. Word has length 101 [2021-05-02 14:52:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:01,239 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 407 transitions. [2021-05-02 14:52:01,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:52:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 407 transitions. [2021-05-02 14:52:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 14:52:01,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:01,241 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:01,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:01,457 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 3 times [2021-05-02 14:52:01,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:01,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457979841] [2021-05-02 14:52:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:01,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:01,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780268924] [2021-05-02 14:52:01,474 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:01,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:52:01,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:01,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:52:01,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,581 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-02 14:52:02,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,859 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 14:52:02,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-05-02 14:52:02,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:02,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457979841] [2021-05-02 14:52:02,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:02,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780268924] [2021-05-02 14:52:02,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780268924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:02,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:02,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:52:02,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965479282] [2021-05-02 14:52:02,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:52:02,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:52:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:52:02,931 INFO L87 Difference]: Start difference. First operand 314 states and 407 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:52:08,976 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 31 DAG size of output: 16 [2021-05-02 14:52:12,848 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 16 [2021-05-02 14:52:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:17,010 INFO L93 Difference]: Finished difference Result 328 states and 425 transitions. [2021-05-02 14:52:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:52:17,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 14:52:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:17,013 INFO L225 Difference]: With dead ends: 328 [2021-05-02 14:52:17,013 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 14:52:17,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3122.6ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:52:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 14:52:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2021-05-02 14:52:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 206 states have (on average 1.2184466019417475) internal successors, (251), 215 states have internal predecessors, (251), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 14:52:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 412 transitions. [2021-05-02 14:52:17,030 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 412 transitions. Word has length 105 [2021-05-02 14:52:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:17,031 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 412 transitions. [2021-05-02 14:52:17,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:52:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 412 transitions. [2021-05-02 14:52:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 14:52:17,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:17,032 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:17,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 14:52:17,233 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:17,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 2 times [2021-05-02 14:52:17,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:17,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841361194] [2021-05-02 14:52:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:17,250 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:17,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678755722] [2021-05-02 14:52:17,250 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:17,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:52:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 14:52:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:17,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:19,072 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-02 14:52:19,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:19,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 69 proven. 69 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-05-02 14:52:19,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841361194] [2021-05-02 14:52:19,646 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678755722] [2021-05-02 14:52:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678755722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:19,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:19,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:52:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854362984] [2021-05-02 14:52:19,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:52:19,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:52:19,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:52:19,647 INFO L87 Difference]: Start difference. First operand 319 states and 412 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 14:52:22,244 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-02 14:52:22,906 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-02 14:52:23,216 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-05-02 14:52:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:24,230 INFO L93 Difference]: Finished difference Result 353 states and 458 transitions. [2021-05-02 14:52:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:52:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 107 [2021-05-02 14:52:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:24,233 INFO L225 Difference]: With dead ends: 353 [2021-05-02 14:52:24,233 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 14:52:24,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2918.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:52:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 14:52:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 345. [2021-05-02 14:52:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 221 states have (on average 1.2217194570135748) internal successors, (270), 231 states have internal predecessors, (270), 91 states have call successors, (91), 33 states have call predecessors, (91), 32 states have return successors, (88), 80 states have call predecessors, (88), 88 states have call successors, (88) [2021-05-02 14:52:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 449 transitions. [2021-05-02 14:52:24,286 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 449 transitions. Word has length 107 [2021-05-02 14:52:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:24,286 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 449 transitions. [2021-05-02 14:52:24,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 14:52:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 449 transitions. [2021-05-02 14:52:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 14:52:24,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:24,288 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:24,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:24,504 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2134846746, now seen corresponding path program 2 times [2021-05-02 14:52:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:24,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160050376] [2021-05-02 14:52:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:24,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:24,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976995107] [2021-05-02 14:52:24,513 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:24,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:52:24,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:24,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:52:24,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:24,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:52:24,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:24,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160050376] [2021-05-02 14:52:24,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:24,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976995107] [2021-05-02 14:52:24,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976995107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:24,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:24,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:24,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014480061] [2021-05-02 14:52:24,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:24,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:24,973 INFO L87 Difference]: Start difference. First operand 345 states and 449 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:52:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:25,581 INFO L93 Difference]: Finished difference Result 440 states and 566 transitions. [2021-05-02 14:52:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:25,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 109 [2021-05-02 14:52:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:25,583 INFO L225 Difference]: With dead ends: 440 [2021-05-02 14:52:25,583 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 14:52:25,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:52:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 14:52:25,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 222. [2021-05-02 14:52:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 155 states have (on average 1.096774193548387) internal successors, (170), 157 states have internal predecessors, (170), 37 states have call successors, (37), 30 states have call predecessors, (37), 29 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:52:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 241 transitions. [2021-05-02 14:52:25,594 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 241 transitions. Word has length 109 [2021-05-02 14:52:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:25,594 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 241 transitions. [2021-05-02 14:52:25,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:52:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 241 transitions. [2021-05-02 14:52:25,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:52:25,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:25,595 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:25,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 14:52:25,811 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:25,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 2 times [2021-05-02 14:52:25,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:25,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125579176] [2021-05-02 14:52:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:25,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:25,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906887911] [2021-05-02 14:52:25,816 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:25,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:52:25,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 14:52:25,881 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:52:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:52:25,912 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:52:25,996 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 14:52:25,996 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:52:26,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 14:52:26,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:52:26 BoogieIcfgContainer [2021-05-02 14:52:26,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:52:26,307 INFO L168 Benchmark]: Toolchain (without parser) took 46256.73 ms. Allocated memory was 222.3 MB in the beginning and 385.9 MB in the end (delta: 163.6 MB). Free memory was 186.5 MB in the beginning and 210.2 MB in the end (delta: -23.7 MB). Peak memory consumption was 141.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:26,307 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 222.3 MB. Free memory is still 202.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:52:26,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.48 ms. Allocated memory is still 222.3 MB. Free memory was 186.3 MB in the beginning and 176.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:26,307 INFO L168 Benchmark]: Boogie Preprocessor took 74.06 ms. Allocated memory is still 222.3 MB. Free memory was 176.1 MB in the beginning and 204.1 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:26,307 INFO L168 Benchmark]: RCFGBuilder took 439.69 ms. Allocated memory is still 222.3 MB. Free memory was 204.1 MB in the beginning and 186.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:26,307 INFO L168 Benchmark]: TraceAbstraction took 45517.61 ms. Allocated memory was 222.3 MB in the beginning and 385.9 MB in the end (delta: 163.6 MB). Free memory was 185.8 MB in the beginning and 210.2 MB in the end (delta: -24.5 MB). Peak memory consumption was 140.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:26,307 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 222.3 MB. Free memory is still 202.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 213.48 ms. Allocated memory is still 222.3 MB. Free memory was 186.3 MB in the beginning and 176.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.06 ms. Allocated memory is still 222.3 MB. Free memory was 176.1 MB in the beginning and 204.1 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 439.69 ms. Allocated memory is still 222.3 MB. Free memory was 204.1 MB in the beginning and 186.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 45517.61 ms. Allocated memory was 222.3 MB in the beginning and 385.9 MB in the end (delta: 163.6 MB). Free memory was 185.8 MB in the beginning and 210.2 MB in the end (delta: -24.5 MB). Peak memory consumption was 140.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=14, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [\old(counter)=0, a=3, b=2, c=1, counter=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, counter++=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, counter++=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=2, xy=6, y=3, yy=9] [L40] COND FALSE !(counter++<5) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 45349.2ms, OverallIterations: 27, TraceHistogramMax: 13, EmptinessCheckTime: 27.4ms, AutomataDifference: 29028.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1244 SDtfs, 885 SDslu, 5156 SDs, 0 SdLazy, 4459 SolverSat, 688 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 23216.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1816 GetRequests, 1547 SyntacticMatches, 6 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 8133.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=345occurred in iteration=25, InterpolantAutomatonStates: 250, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 421.0ms AutomataMinimizationTime, 26 MinimizatonAttempts, 154 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 272.9ms SsaConstructionTime, 801.8ms SatisfiabilityAnalysisTime, 8035.6ms InterpolantComputationTime, 1889 NumberOfCodeBlocks, 1839 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1753 ConstructedInterpolants, 11 QuantifiedInterpolants, 8298 SizeOfPredicates, 125 NumberOfNonLiveVariables, 6039 ConjunctsInSsa, 592 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 2558/3158 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...