/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:52:42,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:52:42,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:52:42,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:52:42,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:52:42,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:52:42,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:52:42,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:52:42,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:52:42,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:52:42,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:52:42,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:52:42,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:52:42,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:52:42,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:52:42,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:52:42,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:52:42,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:52:42,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:52:42,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:52:42,914 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 14:52:42,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:52:42,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:52:42,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:52:42,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:52:42,963 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:52:42,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:52:42,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:52:42,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:52:42,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:52:42,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:52:42,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:52:42,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:52:42,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:52:42,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:52:42,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:52:42,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:52:42,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:52:42,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:52:42,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:52:42,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:52:42,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:52:42,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:52:42,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:52:42,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:52:42,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:52:42,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:52:42,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:52:42,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:52:42,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:52:43,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:52:43,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:52:43,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:52:43,248 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:52:43,249 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:52:43,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2021-05-02 14:52:43,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db352499b/2ae8c2da1fa0487c819c787ef7223140/FLAG3c3877162 [2021-05-02 14:52:43,795 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:52:43,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2021-05-02 14:52:43,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db352499b/2ae8c2da1fa0487c819c787ef7223140/FLAG3c3877162 [2021-05-02 14:52:44,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db352499b/2ae8c2da1fa0487c819c787ef7223140 [2021-05-02 14:52:44,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:52:44,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:52:44,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:52:44,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:52:44,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:52:44,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e499947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44, skipping insertion in model container [2021-05-02 14:52:44,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:52:44,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:52:44,428 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_valuebound100.c[490,503] [2021-05-02 14:52:44,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:52:44,456 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:52:44,484 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_valuebound100.c[490,503] [2021-05-02 14:52:44,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:52:44,530 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:52:44,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44 WrapperNode [2021-05-02 14:52:44,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:52:44,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:52:44,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:52:44,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:52:44,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (1/1) ... [2021-05-02 14:52:44,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:52:44,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:52:44,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:52:44,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:52:44,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (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 14:52:44,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:52:44,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:52:44,631 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:52:44,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:52:44,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:52:44,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:52:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:52:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:52:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:52:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:52:44,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:52:44,633 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:52:44,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:52:44,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:52:44,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:52:44,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:52:44,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:52:44,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:52:44,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:52:44,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:52:44,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:52:44,907 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:52:44,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:52:44 BoogieIcfgContainer [2021-05-02 14:52:44,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:52:44,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:52:44,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:52:44,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:52:44,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:52:44" (1/3) ... [2021-05-02 14:52:44,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339623b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:52:44, skipping insertion in model container [2021-05-02 14:52:44,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:44" (2/3) ... [2021-05-02 14:52:44,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339623b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:52:44, skipping insertion in model container [2021-05-02 14:52:44,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:52:44" (3/3) ... [2021-05-02 14:52:44,919 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2021-05-02 14:52:44,923 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:52:44,925 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:52:44,943 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:52:44,967 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:52:44,967 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:52:44,968 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:52:44,969 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:52:44,969 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:52:44,969 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:52:44,974 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:52:44,974 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:52:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:52:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:52:44,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:44,998 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 14:52:44,998 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:45,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:45,002 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-02 14:52:45,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:45,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936559107] [2021-05-02 14:52:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:52:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:52:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:52:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:52:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:52:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 14:52:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 14:52:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:52:45,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936559107] [2021-05-02 14:52:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936559107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:52:45,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:52:45,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:52:45,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408117483] [2021-05-02 14:52:45,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:52:45,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:52:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:52:45,180 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:45,282 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-02 14:52:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:52:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 14:52:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:45,288 INFO L225 Difference]: With dead ends: 73 [2021-05-02 14:52:45,288 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:52:45,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:52:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:52:45,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:52:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:52:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 14:52:45,319 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 14:52:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:45,319 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 14:52:45,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 14:52:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:52:45,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:45,321 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 14:52:45,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:52:45,321 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-02 14:52:45,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:45,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719433847] [2021-05-02 14:52:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:45,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:45,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561316247] [2021-05-02 14:52:45,336 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 14:52:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:52:45,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:45,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 14:52:45,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:45,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719433847] [2021-05-02 14:52:45,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:45,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561316247] [2021-05-02 14:52:45,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561316247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:45,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:45,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:52:45,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012050492] [2021-05-02 14:52:45,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:52:45,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:45,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:52:45,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:52:45,621 INFO L87 Difference]: Start difference. First operand 35 states and 46 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:45,734 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-02 14:52:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:52:45,735 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-02 14:52:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:45,736 INFO L225 Difference]: With dead ends: 52 [2021-05-02 14:52:45,736 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:52:45,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:52:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:52:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 14:52:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:52:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:52:45,744 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 14:52:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:45,744 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:52:45,744 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:52:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:52:45,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:45,745 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 14:52:45,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:52:45,965 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:45,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-02 14:52:45,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:45,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560934839] [2021-05-02 14:52:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:45,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:45,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025680163] [2021-05-02 14:52:45,977 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 14:52:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:46,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:52:46,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:46,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:52:46,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:46,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560934839] [2021-05-02 14:52:46,180 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:46,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025680163] [2021-05-02 14:52:46,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025680163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:46,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:46,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:46,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776192782] [2021-05-02 14:52:46,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:46,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:46,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:46,181 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:46,328 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-02 14:52:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-02 14:52:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:46,329 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:52:46,329 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:52:46,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:52:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 14:52:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:52:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 14:52:46,336 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 14:52:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:46,337 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 14:52:46,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 14:52:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:52:46,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:46,337 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 14:52:46,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:46,552 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:46,553 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-02 14:52:46,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:46,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842239570] [2021-05-02 14:52:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:46,563 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:46,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309642019] [2021-05-02 14:52:46,563 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 14:52:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:52:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:52:46,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:46,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842239570] [2021-05-02 14:52:46,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:46,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309642019] [2021-05-02 14:52:46,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309642019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:46,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:46,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:46,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247683059] [2021-05-02 14:52:46,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:46,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:46,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:46,807 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:52:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:46,912 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 14:52:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 14:52:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:46,914 INFO L225 Difference]: With dead ends: 56 [2021-05-02 14:52:46,915 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:52:46,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:52:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:52:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:52:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 14:52:46,924 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 14:52:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:46,925 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 14:52:46,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:52:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 14:52:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:52:46,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:46,925 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1] [2021-05-02 14:52:47,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:47,136 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-02 14:52:47,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:47,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035572223] [2021-05-02 14:52:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:47,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:47,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470472008] [2021-05-02 14:52:47,146 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 14:52:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:47,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:52:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:47,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:52:47,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:47,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035572223] [2021-05-02 14:52:47,349 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:47,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470472008] [2021-05-02 14:52:47,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470472008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:47,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:47,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:47,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493759428] [2021-05-02 14:52:47,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:47,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:47,351 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 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 14:52:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:47,452 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-02 14:52:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:47,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 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 55 [2021-05-02 14:52:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:47,453 INFO L225 Difference]: With dead ends: 60 [2021-05-02 14:52:47,453 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 14:52:47,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 14:52:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 14:52:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:52:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 14:52:47,461 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 14:52:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:47,461 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 14:52:47,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 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 14:52:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 14:52:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:52:47,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:47,462 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1] [2021-05-02 14:52:47,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:47,678 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:47,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-02 14:52:47,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:47,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541653594] [2021-05-02 14:52:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:47,705 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:47,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256350092] [2021-05-02 14:52:47,705 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 14:52:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:47,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:52:47,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 14:52:47,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:47,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541653594] [2021-05-02 14:52:47,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:47,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256350092] [2021-05-02 14:52:47,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256350092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:47,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:47,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:52:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202732526] [2021-05-02 14:52:47,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:52:47,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:47,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:52:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:52:47,937 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:52:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:50,192 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-02 14:52:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:52:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-02 14:52:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:50,193 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:52:50,194 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 14:52:50,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 14:52:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 14:52:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:52:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 14:52:50,205 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 14:52:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:50,205 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 14:52:50,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:52:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 14:52:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 14:52:50,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:50,206 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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 14:52:50,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:52:50,426 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:50,426 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-02 14:52:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:50,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103228255] [2021-05-02 14:52:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:50,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:50,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57858342] [2021-05-02 14:52:50,436 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 14:52:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:52:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:50,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:52:50,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:50,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103228255] [2021-05-02 14:52:50,626 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57858342] [2021-05-02 14:52:50,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57858342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:50,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:50,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:52:50,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646671357] [2021-05-02 14:52:50,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:52:50,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:50,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:52:50,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:52:50,633 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 14:52:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:50,779 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-05-02 14:52:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:52:50,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-05-02 14:52:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:50,781 INFO L225 Difference]: With dead ends: 91 [2021-05-02 14:52:50,781 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 14:52:50,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:52:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 14:52:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 14:52:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:52:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:52:50,792 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 14:52:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:50,792 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:52:50,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 14:52:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:52:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:52:50,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:50,793 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1] [2021-05-02 14:52:51,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:51,013 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:51,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-02 14:52:51,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:51,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380451438] [2021-05-02 14:52:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:51,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:51,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420570771] [2021-05-02 14:52:51,033 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 14:52:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:51,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:52:51,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:51,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:52:51,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:51,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380451438] [2021-05-02 14:52:51,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:51,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420570771] [2021-05-02 14:52:51,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420570771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:51,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:51,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:52:51,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674065204] [2021-05-02 14:52:51,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:52:51,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:51,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:52:51,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:52:51,257 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:52:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:51,420 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2021-05-02 14:52:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:51,420 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:52:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:51,421 INFO L225 Difference]: With dead ends: 124 [2021-05-02 14:52:51,422 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:52:51,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:52:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 14:52:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:52:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 14:52:51,436 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 14:52:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:51,437 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 14:52:51,437 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:52:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 14:52:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 14:52:51,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:51,438 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2021-05-02 14:52:51,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:51,653 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2021-05-02 14:52:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:51,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966809671] [2021-05-02 14:52:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:51,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:51,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125100105] [2021-05-02 14:52:51,662 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 14:52:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:52:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:51,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-05-02 14:52:51,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:51,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966809671] [2021-05-02 14:52:51,992 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:51,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125100105] [2021-05-02 14:52:51,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125100105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:51,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:51,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:52:51,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056402064] [2021-05-02 14:52:51,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:52:51,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:51,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:52:51,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:52:51,993 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:52:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:52,193 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2021-05-02 14:52:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:52:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 14:52:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:52,195 INFO L225 Difference]: With dead ends: 150 [2021-05-02 14:52:52,195 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 14:52:52,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:52:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 14:52:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 14:52:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:52:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 14:52:52,212 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 14:52:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:52,213 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 14:52:52,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:52:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 14:52:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:52:52,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:52,214 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:52,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:52:52,430 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2021-05-02 14:52:52,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:52,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446679421] [2021-05-02 14:52:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:52,438 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:52,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851972267] [2021-05-02 14:52:52,438 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 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 14:52:52,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:52:52,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:52:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:52,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-02 14:52:52,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:52,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446679421] [2021-05-02 14:52:52,749 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:52,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851972267] [2021-05-02 14:52:52,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851972267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:52,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:52,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:52:52,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346754222] [2021-05-02 14:52:52,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:52:52,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:52:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:52:52,750 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 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 14:52:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:52,946 INFO L93 Difference]: Finished difference Result 152 states and 213 transitions. [2021-05-02 14:52:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:52:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 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 80 [2021-05-02 14:52:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:52,948 INFO L225 Difference]: With dead ends: 152 [2021-05-02 14:52:52,949 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 14:52:52,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 14:52:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 14:52:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:52:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 14:52:52,965 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 14:52:52,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:52,965 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 14:52:52,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 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 14:52:52,966 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 14:52:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:52:52,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:52,966 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2021-05-02 14:52:53,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:53,185 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2021-05-02 14:52:53,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:53,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681778306] [2021-05-02 14:52:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:53,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:53,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171092356] [2021-05-02 14:52:53,193 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 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 14:52:53,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:52:53,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:52:53,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:53,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-02 14:52:53,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681778306] [2021-05-02 14:52:53,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171092356] [2021-05-02 14:52:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171092356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:53,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:53,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:52:53,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605622772] [2021-05-02 14:52:53,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:52:53,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:52:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:52:53,630 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:52:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:53,951 INFO L93 Difference]: Finished difference Result 156 states and 216 transitions. [2021-05-02 14:52:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:52:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 14:52:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:53,953 INFO L225 Difference]: With dead ends: 156 [2021-05-02 14:52:53,953 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 14:52:53,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:52:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 14:52:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 14:52:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 80 states have (on average 1.1875) internal successors, (95), 87 states have internal predecessors, (95), 60 states have call successors, (60), 12 states have call predecessors, (60), 11 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:52:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-02 14:52:53,968 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-02 14:52:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:53,968 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-02 14:52:53,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:52:53,968 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-02 14:52:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:52:53,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:53,969 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 14:52:54,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:54,186 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-02 14:52:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:54,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643253510] [2021-05-02 14:52:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:54,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:54,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62695587] [2021-05-02 14:52:54,193 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 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 14:52:54,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:52:54,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:52:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:54,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-02 14:52:54,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643253510] [2021-05-02 14:52:54,449 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62695587] [2021-05-02 14:52:54,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62695587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:54,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:54,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:52:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523211189] [2021-05-02 14:52:54,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:52:54,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:54,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:52:54,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:54,451 INFO L87 Difference]: Start difference. First operand 152 states and 212 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:52:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:54,734 INFO L93 Difference]: Finished difference Result 215 states and 319 transitions. [2021-05-02 14:52:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:52:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 89 [2021-05-02 14:52:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:54,736 INFO L225 Difference]: With dead ends: 215 [2021-05-02 14:52:54,736 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 14:52:54,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:52:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 14:52:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2021-05-02 14:52:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 100 states have internal predecessors, (113), 80 states have call successors, (80), 13 states have call predecessors, (80), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-02 14:52:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-05-02 14:52:54,757 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 89 [2021-05-02 14:52:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:54,758 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-05-02 14:52:54,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:52:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-05-02 14:52:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 14:52:54,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:54,758 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 14:52:54,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:52:54,975 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-02 14:52:54,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:54,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275718495] [2021-05-02 14:52:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:54,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:54,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855168387] [2021-05-02 14:52:54,982 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 14:52:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:55,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 14:52:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:55,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 14:52:55,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275718495] [2021-05-02 14:52:55,448 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855168387] [2021-05-02 14:52:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855168387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:55,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:55,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:52:55,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79600275] [2021-05-02 14:52:55,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:52:55,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:52:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:52:55,450 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 14:52:55,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:55,914 INFO L93 Difference]: Finished difference Result 221 states and 320 transitions. [2021-05-02 14:52:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:52:55,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 91 [2021-05-02 14:52:55,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:55,916 INFO L225 Difference]: With dead ends: 221 [2021-05-02 14:52:55,916 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 14:52:55,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:52:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 14:52:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 14:52:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 117 states have internal predecessors, (132), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 14:52:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 315 transitions. [2021-05-02 14:52:55,952 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 315 transitions. Word has length 91 [2021-05-02 14:52:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:55,952 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 315 transitions. [2021-05-02 14:52:55,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 14:52:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 315 transitions. [2021-05-02 14:52:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 14:52:55,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:55,953 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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 14:52:56,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:52:56,169 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 4 times [2021-05-02 14:52:56,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:56,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319967806] [2021-05-02 14:52:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:56,182 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:56,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282643953] [2021-05-02 14:52:56,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:52:56,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:52:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:56,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:52:56,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:56,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 14:52:56,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:56,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319967806] [2021-05-02 14:52:56,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:56,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282643953] [2021-05-02 14:52:56,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282643953] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:52:56,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:52:56,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:52:56,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315775042] [2021-05-02 14:52:56,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:52:56,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:52:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:52:56,373 INFO L87 Difference]: Start difference. First operand 217 states and 315 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 14:52:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:56,441 INFO L93 Difference]: Finished difference Result 265 states and 384 transitions. [2021-05-02 14:52:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:52:56,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-02 14:52:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:56,443 INFO L225 Difference]: With dead ends: 265 [2021-05-02 14:52:56,443 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 14:52:56,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:52:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 14:52:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-05-02 14:52:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 94 states have (on average 1.148936170212766) internal successors, (108), 101 states have internal predecessors, (108), 76 states have call successors, (76), 15 states have call predecessors, (76), 14 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 14:52:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 257 transitions. [2021-05-02 14:52:56,467 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 257 transitions. Word has length 100 [2021-05-02 14:52:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:56,469 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 257 transitions. [2021-05-02 14:52:56,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 14:52:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 257 transitions. [2021-05-02 14:52:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 14:52:56,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:56,470 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1] [2021-05-02 14:52:56,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:52:56,687 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2021-05-02 14:52:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:56,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454934619] [2021-05-02 14:52:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:56,701 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:56,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224052215] [2021-05-02 14:52:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:52:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 14:52:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:56,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:56,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 41 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-05-02 14:52:57,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:57,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454934619] [2021-05-02 14:52:57,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:57,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224052215] [2021-05-02 14:52:57,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224052215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:57,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:57,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:52:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006468780] [2021-05-02 14:52:57,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:52:57,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:52:57,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:52:57,233 INFO L87 Difference]: Start difference. First operand 185 states and 257 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:53:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:03,789 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2021-05-02 14:53:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:53:03,790 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 14:53:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:03,791 INFO L225 Difference]: With dead ends: 192 [2021-05-02 14:53:03,791 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 14:53:03,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:53:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 14:53:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-05-02 14:53:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 87 states have internal predecessors, (93), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:53:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2021-05-02 14:53:03,811 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 107 [2021-05-02 14:53:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:03,811 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2021-05-02 14:53:03,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:53:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2021-05-02 14:53:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 14:53:03,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:03,812 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 14:53:04,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:04,029 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1483033219, now seen corresponding path program 3 times [2021-05-02 14:53:04,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:04,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630650157] [2021-05-02 14:53:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:04,042 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:04,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35606733] [2021-05-02 14:53:04,043 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 14:53:04,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:53:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:53:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:04,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 87 proven. 11 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-05-02 14:53:04,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630650157] [2021-05-02 14:53:04,265 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35606733] [2021-05-02 14:53:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35606733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:04,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:04,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:53:04,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691136951] [2021-05-02 14:53:04,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:53:04,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:53:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:53:04,266 INFO L87 Difference]: Start difference. First operand 158 states and 216 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 14:53:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:04,344 INFO L93 Difference]: Finished difference Result 164 states and 221 transitions. [2021-05-02 14:53:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:53:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-02 14:53:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:04,345 INFO L225 Difference]: With dead ends: 164 [2021-05-02 14:53:04,345 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 14:53:04,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:53:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 14:53:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2021-05-02 14:53:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 79 states have internal predecessors, (83), 50 states have call successors, (50), 14 states have call predecessors, (50), 13 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 14:53:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2021-05-02 14:53:04,359 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 111 [2021-05-02 14:53:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:04,359 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2021-05-02 14:53:04,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 14:53:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2021-05-02 14:53:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 14:53:04,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:04,360 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:53:04,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:53:04,576 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 2 times [2021-05-02 14:53:04,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:04,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22948468] [2021-05-02 14:53:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:04,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:04,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151729014] [2021-05-02 14:53:04,582 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 14:53:04,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:53:04,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:04,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 14:53:04,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:04,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:05,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 65 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-05-02 14:53:05,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:05,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22948468] [2021-05-02 14:53:05,148 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:05,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151729014] [2021-05-02 14:53:05,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151729014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:05,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:05,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:53:05,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144465003] [2021-05-02 14:53:05,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:53:05,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:05,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:53:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:53:05,149 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:53:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:05,783 INFO L93 Difference]: Finished difference Result 174 states and 230 transitions. [2021-05-02 14:53:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:53:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2021-05-02 14:53:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:05,784 INFO L225 Difference]: With dead ends: 174 [2021-05-02 14:53:05,785 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 14:53:05,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:53:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 14:53:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-05-02 14:53:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 96 states have internal predecessors, (101), 63 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:53:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 224 transitions. [2021-05-02 14:53:05,819 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 224 transitions. Word has length 113 [2021-05-02 14:53:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:05,820 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 224 transitions. [2021-05-02 14:53:05,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:53:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 224 transitions. [2021-05-02 14:53:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 14:53:05,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:05,837 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1] [2021-05-02 14:53:06,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:53:06,053 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 3 times [2021-05-02 14:53:06,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:06,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740371054] [2021-05-02 14:53:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:06,073 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:06,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478473683] [2021-05-02 14:53:06,074 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 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 14:53:06,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:53:06,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:53:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 14:53:06,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:06,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740371054] [2021-05-02 14:53:06,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:06,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478473683] [2021-05-02 14:53:06,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478473683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:06,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:06,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:53:06,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925458041] [2021-05-02 14:53:06,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:53:06,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:53:06,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:53:06,322 INFO L87 Difference]: Start difference. First operand 169 states and 224 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 14:53:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:06,518 INFO L93 Difference]: Finished difference Result 215 states and 301 transitions. [2021-05-02 14:53:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:53:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-02 14:53:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:06,519 INFO L225 Difference]: With dead ends: 215 [2021-05-02 14:53:06,519 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 14:53:06,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:53:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 14:53:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-05-02 14:53:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 99 states have internal predecessors, (112), 75 states have call successors, (75), 16 states have call predecessors, (75), 15 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:53:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 259 transitions. [2021-05-02 14:53:06,539 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 259 transitions. Word has length 116 [2021-05-02 14:53:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:06,539 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 259 transitions. [2021-05-02 14:53:06,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 14:53:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 259 transitions. [2021-05-02 14:53:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 14:53:06,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:06,541 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:53:06,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:53:06,757 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:06,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:06,758 INFO L82 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 2 times [2021-05-02 14:53:06,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:06,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080928629] [2021-05-02 14:53:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:06,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:06,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018740126] [2021-05-02 14:53:06,770 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 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 14:53:06,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:53:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:53:06,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:06,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 49 proven. 62 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-05-02 14:53:07,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:07,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080928629] [2021-05-02 14:53:07,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:07,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018740126] [2021-05-02 14:53:07,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018740126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:07,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:07,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:53:07,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502132939] [2021-05-02 14:53:07,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:53:07,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:07,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:53:07,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:53:07,374 INFO L87 Difference]: Start difference. First operand 188 states and 259 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:53:08,781 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-05-02 14:53:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:09,332 INFO L93 Difference]: Finished difference Result 267 states and 380 transitions. [2021-05-02 14:53:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 14:53:09,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2021-05-02 14:53:09,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:09,334 INFO L225 Difference]: With dead ends: 267 [2021-05-02 14:53:09,334 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 14:53:09,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1172.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 14:53:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 14:53:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2021-05-02 14:53:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 132 states have internal predecessors, (152), 111 states have call successors, (111), 18 states have call predecessors, (111), 17 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 14:53:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2021-05-02 14:53:09,361 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 122 [2021-05-02 14:53:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:09,362 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2021-05-02 14:53:09,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:53:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2021-05-02 14:53:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 14:53:09,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:09,363 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-02 14:53:09,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:09,579 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:09,580 INFO L82 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 3 times [2021-05-02 14:53:09,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:09,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926246653] [2021-05-02 14:53:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:09,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:09,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893117963] [2021-05-02 14:53:09,588 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 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 14:53:09,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:53:09,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:09,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 14:53:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:09,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:09,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:09,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:09,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:09,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 78 proven. 41 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-02 14:53:10,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:10,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926246653] [2021-05-02 14:53:10,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:10,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893117963] [2021-05-02 14:53:10,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893117963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:10,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:10,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:53:10,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128114991] [2021-05-02 14:53:10,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:53:10,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:10,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:53:10,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:53:10,025 INFO L87 Difference]: Start difference. First operand 259 states and 371 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:53:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:10,642 INFO L93 Difference]: Finished difference Result 301 states and 423 transitions. [2021-05-02 14:53:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:53:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-02 14:53:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:10,644 INFO L225 Difference]: With dead ends: 301 [2021-05-02 14:53:10,644 INFO L226 Difference]: Without dead ends: 299 [2021-05-02 14:53:10,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:53:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-02 14:53:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2021-05-02 14:53:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 153 states have internal predecessors, (175), 123 states have call successors, (123), 22 states have call predecessors, (123), 21 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:53:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 418 transitions. [2021-05-02 14:53:10,677 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 418 transitions. Word has length 127 [2021-05-02 14:53:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:10,679 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 418 transitions. [2021-05-02 14:53:10,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:53:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 418 transitions. [2021-05-02 14:53:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 14:53:10,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:10,680 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2021-05-02 14:53:10,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:10,898 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:10,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 4 times [2021-05-02 14:53:10,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:10,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670572182] [2021-05-02 14:53:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:10,905 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:10,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962502064] [2021-05-02 14:53:10,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:53:10,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:53:10,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 14:53:10,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:11,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 119 proven. 93 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-05-02 14:53:11,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:11,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670572182] [2021-05-02 14:53:11,537 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:11,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962502064] [2021-05-02 14:53:11,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962502064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:11,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:11,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:53:11,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513583322] [2021-05-02 14:53:11,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:53:11,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:53:11,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:53:11,538 INFO L87 Difference]: Start difference. First operand 296 states and 418 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 14:53:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:16,144 INFO L93 Difference]: Finished difference Result 316 states and 434 transitions. [2021-05-02 14:53:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:53:16,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-02 14:53:16,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:16,146 INFO L225 Difference]: With dead ends: 316 [2021-05-02 14:53:16,147 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 14:53:16,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:53:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 14:53:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-05-02 14:53:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 163 states have (on average 1.147239263803681) internal successors, (187), 165 states have internal predecessors, (187), 123 states have call successors, (123), 26 states have call predecessors, (123), 25 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:53:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 430 transitions. [2021-05-02 14:53:16,178 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 430 transitions. Word has length 129 [2021-05-02 14:53:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:16,178 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 430 transitions. [2021-05-02 14:53:16,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 14:53:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 430 transitions. [2021-05-02 14:53:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 14:53:16,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:16,179 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-05-02 14:53:16,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:53:16,396 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:16,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 5 times [2021-05-02 14:53:16,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:16,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154332280] [2021-05-02 14:53:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:16,404 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:16,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171613616] [2021-05-02 14:53:16,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:53:28,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 14:53:28,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:28,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 14:53:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 91 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 14:53:29,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:29,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154332280] [2021-05-02 14:53:29,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:29,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171613616] [2021-05-02 14:53:29,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171613616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:29,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:29,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 14:53:29,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014775727] [2021-05-02 14:53:29,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:53:29,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:53:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:53:29,594 INFO L87 Difference]: Start difference. First operand 312 states and 430 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 14:53:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:33,777 INFO L93 Difference]: Finished difference Result 335 states and 449 transitions. [2021-05-02 14:53:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:53:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) Word has length 132 [2021-05-02 14:53:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:33,779 INFO L225 Difference]: With dead ends: 335 [2021-05-02 14:53:33,780 INFO L226 Difference]: Without dead ends: 333 [2021-05-02 14:53:33,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1057.9ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:53:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-02 14:53:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-05-02 14:53:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 177 states have internal predecessors, (199), 123 states have call successors, (123), 30 states have call predecessors, (123), 29 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:53:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 442 transitions. [2021-05-02 14:53:33,813 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 442 transitions. Word has length 132 [2021-05-02 14:53:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:33,814 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 442 transitions. [2021-05-02 14:53:33,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 14:53:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 442 transitions. [2021-05-02 14:53:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 14:53:33,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:33,815 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:53:34,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:53:34,025 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:34,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 4 times [2021-05-02 14:53:34,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:34,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766274316] [2021-05-02 14:53:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:34,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:34,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353864687] [2021-05-02 14:53:34,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:53:34,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:53:34,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 14:53:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:34,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 84 proven. 85 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 14:53:34,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:34,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766274316] [2021-05-02 14:53:34,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:34,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353864687] [2021-05-02 14:53:34,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353864687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:34,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:34,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:53:34,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303523617] [2021-05-02 14:53:34,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:53:34,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:34,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:53:34,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:53:34,664 INFO L87 Difference]: Start difference. First operand 328 states and 442 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:53:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:35,562 INFO L93 Difference]: Finished difference Result 364 states and 497 transitions. [2021-05-02 14:53:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:53:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 135 [2021-05-02 14:53:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:35,566 INFO L225 Difference]: With dead ends: 364 [2021-05-02 14:53:35,566 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 14:53:35,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:53:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 14:53:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 359. [2021-05-02 14:53:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 139 states have call successors, (139), 31 states have call predecessors, (139), 30 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 14:53:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 491 transitions. [2021-05-02 14:53:35,620 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 491 transitions. Word has length 135 [2021-05-02 14:53:35,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:35,620 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 491 transitions. [2021-05-02 14:53:35,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:53:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 491 transitions. [2021-05-02 14:53:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 14:53:35,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:35,622 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 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] [2021-05-02 14:53:35,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:35,833 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:35,834 INFO L82 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 5 times [2021-05-02 14:53:35,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:35,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281636422] [2021-05-02 14:53:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:35,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:35,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657037958] [2021-05-02 14:53:35,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:53:35,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 14:53:35,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:35,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 14:53:35,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:36,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:36,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:38,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 102 proven. 153 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-05-02 14:53:39,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:39,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281636422] [2021-05-02 14:53:39,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:39,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657037958] [2021-05-02 14:53:39,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657037958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:39,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:39,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 14:53:39,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70766451] [2021-05-02 14:53:39,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 14:53:39,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:39,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 14:53:39,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:53:39,336 INFO L87 Difference]: Start difference. First operand 359 states and 491 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:53:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:42,615 INFO L93 Difference]: Finished difference Result 413 states and 561 transitions. [2021-05-02 14:53:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:53:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-02 14:53:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:42,618 INFO L225 Difference]: With dead ends: 413 [2021-05-02 14:53:42,618 INFO L226 Difference]: Without dead ends: 411 [2021-05-02 14:53:42,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 3154.9ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:53:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-02 14:53:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 407. [2021-05-02 14:53:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 215 states have (on average 1.1441860465116278) internal successors, (246), 218 states have internal predecessors, (246), 156 states have call successors, (156), 36 states have call predecessors, (156), 35 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-02 14:53:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 555 transitions. [2021-05-02 14:53:42,661 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 555 transitions. Word has length 138 [2021-05-02 14:53:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:42,662 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 555 transitions. [2021-05-02 14:53:42,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:53:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 555 transitions. [2021-05-02 14:53:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 14:53:42,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:42,664 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 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] [2021-05-02 14:53:42,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 14:53:42,879 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:42,880 INFO L82 PathProgramCache]: Analyzing trace with hash -206620137, now seen corresponding path program 1 times [2021-05-02 14:53:42,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:42,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970743148] [2021-05-02 14:53:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:42,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:42,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736111311] [2021-05-02 14:53:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:53:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:53:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 14:53:42,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:43,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 59 proven. 123 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-05-02 14:53:43,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:43,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970743148] [2021-05-02 14:53:43,628 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:43,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736111311] [2021-05-02 14:53:43,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736111311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:43,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:43,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:53:43,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786985184] [2021-05-02 14:53:43,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:53:43,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:43,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:53:43,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:53:43,629 INFO L87 Difference]: Start difference. First operand 407 states and 555 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 14:53:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:44,551 INFO L93 Difference]: Finished difference Result 421 states and 567 transitions. [2021-05-02 14:53:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:53:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 143 [2021-05-02 14:53:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:44,554 INFO L225 Difference]: With dead ends: 421 [2021-05-02 14:53:44,554 INFO L226 Difference]: Without dead ends: 417 [2021-05-02 14:53:44,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:53:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-02 14:53:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2021-05-02 14:53:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 221 states have (on average 1.1357466063348416) internal successors, (251), 223 states have internal predecessors, (251), 155 states have call successors, (155), 38 states have call predecessors, (155), 37 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2021-05-02 14:53:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 558 transitions. [2021-05-02 14:53:44,605 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 558 transitions. Word has length 143 [2021-05-02 14:53:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:44,606 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 558 transitions. [2021-05-02 14:53:44,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 14:53:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 558 transitions. [2021-05-02 14:53:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 14:53:44,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:44,608 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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 14:53:44,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:44,824 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash 391502270, now seen corresponding path program 6 times [2021-05-02 14:53:44,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:44,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550448260] [2021-05-02 14:53:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:44,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:44,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434059054] [2021-05-02 14:53:44,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:54:12,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:54:12,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:54:12,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 14:54:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:12,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,779 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-05-02 14:54:12,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:12,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:18,431 WARN L205 SmtUtils]: Spent 5.45 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 14:54:37,038 WARN L205 SmtUtils]: Spent 16.45 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 14:55:01,110 WARN L205 SmtUtils]: Spent 12.99 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 14:55:01,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:21,242 WARN L205 SmtUtils]: Spent 12.41 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 14:55:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:21,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:23,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:25,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:27,422 WARN L838 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (<= v_main_~x~0_BEFORE_CALL_261 100) (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))))) is different from false [2021-05-02 14:55:27,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:27,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:29,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:31,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,576 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (<= v_main_~x~0_BEFORE_CALL_261 100) (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) is different from false [2021-05-02 14:55:35,588 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (<= v_main_~x~0_BEFORE_CALL_261 100) (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) is different from true [2021-05-02 14:55:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 110 proven. 82 refuted. 3 times theorem prover too weak. 496 trivial. 2 not checked. [2021-05-02 14:55:35,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:35,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550448260] [2021-05-02 14:55:35,590 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:35,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434059054] [2021-05-02 14:55:35,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434059054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:35,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:35,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:55:35,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260896968] [2021-05-02 14:55:35,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:55:35,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:35,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:55:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=251, Unknown=10, NotChecked=66, Total=380 [2021-05-02 14:55:35,591 INFO L87 Difference]: Start difference. First operand 414 states and 558 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:55:46,387 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 34 DAG size of output: 3 [2021-05-02 14:55:54,570 WARN L205 SmtUtils]: Spent 8.17 s on a formula simplification. DAG size of input: 40 DAG size of output: 6 [2021-05-02 14:56:30,639 WARN L205 SmtUtils]: Spent 18.77 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 14:57:56,384 WARN L205 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-02 14:58:25,434 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (<= v_main_~x~0_BEFORE_CALL_261 100) (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from false [2021-05-02 14:58:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:27,476 INFO L93 Difference]: Finished difference Result 440 states and 584 transitions. [2021-05-02 14:58:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:58:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 144 [2021-05-02 14:58:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:27,481 INFO L225 Difference]: With dead ends: 440 [2021-05-02 14:58:27,481 INFO L226 Difference]: Without dead ends: 438 [2021-05-02 14:58:27,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 178324.2ms TimeCoverageRelationStatistics Valid=91, Invalid=505, Unknown=16, NotChecked=144, Total=756 [2021-05-02 14:58:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-02 14:58:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2021-05-02 14:58:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 237 states have (on average 1.1265822784810127) internal successors, (267), 240 states have internal predecessors, (267), 157 states have call successors, (157), 42 states have call predecessors, (157), 41 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2021-05-02 14:58:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 578 transitions. [2021-05-02 14:58:27,543 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 578 transitions. Word has length 144 [2021-05-02 14:58:27,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:27,543 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 578 transitions. [2021-05-02 14:58:27,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:58:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 578 transitions. [2021-05-02 14:58:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 14:58:27,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:27,544 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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 14:58:27,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 14:58:27,749 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:27,749 INFO L82 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 7 times [2021-05-02 14:58:27,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:27,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538731117] [2021-05-02 14:58:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:27,754 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:27,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311467141] [2021-05-02 14:58:27,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 14:58:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 14:58:27,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:27,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:27,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:27,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:27,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:27,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:27,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:28,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 129 proven. 197 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 14:58:33,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:33,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538731117] [2021-05-02 14:58:33,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:33,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311467141] [2021-05-02 14:58:33,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311467141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:33,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:33,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 14:58:33,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231351826] [2021-05-02 14:58:33,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 14:58:33,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:33,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 14:58:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:58:33,366 INFO L87 Difference]: Start difference. First operand 436 states and 578 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-02 14:58:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:35,269 INFO L93 Difference]: Finished difference Result 478 states and 630 transitions. [2021-05-02 14:58:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:58:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 149 [2021-05-02 14:58:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:35,273 INFO L225 Difference]: With dead ends: 478 [2021-05-02 14:58:35,273 INFO L226 Difference]: Without dead ends: 476 [2021-05-02 14:58:35,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1205.9ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-02 14:58:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-05-02 14:58:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 473. [2021-05-02 14:58:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 258 states have (on average 1.124031007751938) internal successors, (290), 261 states have internal predecessors, (290), 169 states have call successors, (169), 46 states have call predecessors, (169), 45 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 14:58:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 625 transitions. [2021-05-02 14:58:35,375 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 625 transitions. Word has length 149 [2021-05-02 14:58:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:35,375 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 625 transitions. [2021-05-02 14:58:35,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-02 14:58:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 625 transitions. [2021-05-02 14:58:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 14:58:35,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:35,377 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 14:58:35,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:35,593 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:35,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:35,593 INFO L82 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 8 times [2021-05-02 14:58:35,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:35,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485745227] [2021-05-02 14:58:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:35,600 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:35,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981984050] [2021-05-02 14:58:35,600 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:35,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:58:35,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:35,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 14:58:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:35,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 137 proven. 208 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-05-02 14:58:36,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:36,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485745227] [2021-05-02 14:58:36,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:36,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981984050] [2021-05-02 14:58:36,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981984050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:36,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:36,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:58:36,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727339187] [2021-05-02 14:58:36,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:58:36,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:36,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:58:36,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:58:36,973 INFO L87 Difference]: Start difference. First operand 473 states and 625 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-02 14:58:40,357 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-02 14:58:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:42,745 INFO L93 Difference]: Finished difference Result 485 states and 635 transitions. [2021-05-02 14:58:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:58:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2021-05-02 14:58:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:42,748 INFO L225 Difference]: With dead ends: 485 [2021-05-02 14:58:42,748 INFO L226 Difference]: Without dead ends: 483 [2021-05-02 14:58:42,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1191.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:58:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-05-02 14:58:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 481. [2021-05-02 14:58:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 264 states have (on average 1.121212121212121) internal successors, (296), 267 states have internal predecessors, (296), 169 states have call successors, (169), 48 states have call predecessors, (169), 47 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 14:58:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 631 transitions. [2021-05-02 14:58:42,795 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 631 transitions. Word has length 151 [2021-05-02 14:58:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:42,795 INFO L480 AbstractCegarLoop]: Abstraction has 481 states and 631 transitions. [2021-05-02 14:58:42,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-02 14:58:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 631 transitions. [2021-05-02 14:58:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 14:58:42,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:42,797 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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 14:58:43,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 14:58:43,012 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:43,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 9 times [2021-05-02 14:58:43,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:43,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145770596] [2021-05-02 14:58:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:43,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:43,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482935331] [2021-05-02 14:58:43,017 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:43,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:58:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:43,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 14:58:43,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:43,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:43,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 91 proven. 58 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2021-05-02 14:58:43,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145770596] [2021-05-02 14:58:43,633 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482935331] [2021-05-02 14:58:43,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482935331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:43,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:43,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:58:43,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909633035] [2021-05-02 14:58:43,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:58:43,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:58:43,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:58:43,634 INFO L87 Difference]: Start difference. First operand 481 states and 631 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-02 14:58:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:48,539 INFO L93 Difference]: Finished difference Result 524 states and 686 transitions. [2021-05-02 14:58:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:58:48,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 154 [2021-05-02 14:58:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:48,542 INFO L225 Difference]: With dead ends: 524 [2021-05-02 14:58:48,542 INFO L226 Difference]: Without dead ends: 522 [2021-05-02 14:58:48,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:58:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-05-02 14:58:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 518. [2021-05-02 14:58:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 285 states have (on average 1.1228070175438596) internal successors, (320), 288 states have internal predecessors, (320), 181 states have call successors, (181), 52 states have call predecessors, (181), 51 states have return successors, (178), 177 states have call predecessors, (178), 178 states have call successors, (178) [2021-05-02 14:58:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 679 transitions. [2021-05-02 14:58:48,595 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 679 transitions. Word has length 154 [2021-05-02 14:58:48,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:48,595 INFO L480 AbstractCegarLoop]: Abstraction has 518 states and 679 transitions. [2021-05-02 14:58:48,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-02 14:58:48,595 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 679 transitions. [2021-05-02 14:58:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 14:58:48,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:48,596 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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 14:58:48,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:48,812 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 10 times [2021-05-02 14:58:48,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:48,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000761304] [2021-05-02 14:58:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:48,818 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:48,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998556470] [2021-05-02 14:58:48,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:48,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:58:48,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 119 conjunts are in the unsatisfiable core [2021-05-02 14:58:48,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,002 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-02 14:58:50,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,799 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 14:58:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:51,122 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 14:58:51,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:51,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,722 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 14:59:31,346 WARN L205 SmtUtils]: Spent 22.34 s on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-02 14:59:31,796 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 14:59:31,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:31,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:31,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:31,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:31,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:31,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:31,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:31,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 198 proven. 182 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-05-02 14:59:34,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:34,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000761304] [2021-05-02 14:59:34,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:34,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998556470] [2021-05-02 14:59:34,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998556470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:34,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:34,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 14:59:34,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498059588] [2021-05-02 14:59:34,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 14:59:34,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:34,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 14:59:34,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=429, Unknown=7, NotChecked=0, Total=506 [2021-05-02 14:59:34,699 INFO L87 Difference]: Start difference. First operand 518 states and 679 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-05-02 14:59:37,852 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 14:59:47,857 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-02 15:00:04,738 WARN L205 SmtUtils]: Spent 12.55 s on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-05-02 15:00:35,345 WARN L205 SmtUtils]: Spent 15.85 s on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2021-05-02 15:00:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:42,638 INFO L93 Difference]: Finished difference Result 555 states and 730 transitions. [2021-05-02 15:00:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 15:00:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) Word has length 154 [2021-05-02 15:00:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:42,654 INFO L225 Difference]: With dead ends: 555 [2021-05-02 15:00:42,654 INFO L226 Difference]: Without dead ends: 553 [2021-05-02 15:00:42,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 93194.3ms TimeCoverageRelationStatistics Valid=120, Invalid=735, Unknown=15, NotChecked=0, Total=870 [2021-05-02 15:00:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-05-02 15:00:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 526. [2021-05-02 15:00:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 291 states have (on average 1.120274914089347) internal successors, (326), 294 states have internal predecessors, (326), 181 states have call successors, (181), 54 states have call predecessors, (181), 53 states have return successors, (178), 177 states have call predecessors, (178), 178 states have call successors, (178) [2021-05-02 15:00:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 685 transitions. [2021-05-02 15:00:42,787 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 685 transitions. Word has length 154 [2021-05-02 15:00:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:42,787 INFO L480 AbstractCegarLoop]: Abstraction has 526 states and 685 transitions. [2021-05-02 15:00:42,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-05-02 15:00:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 685 transitions. [2021-05-02 15:00:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 15:00:42,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:42,789 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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 15:00:42,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 15:00:42,989 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 6 times [2021-05-02 15:00:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:42,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958268643] [2021-05-02 15:00:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:42,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:42,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718229027] [2021-05-02 15:00:42,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:43,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 15:00:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 15:00:43,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:43,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:43,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 96 proven. 34 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-05-02 15:00:44,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:44,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958268643] [2021-05-02 15:00:44,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:44,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718229027] [2021-05-02 15:00:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718229027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:44,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:44,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:00:44,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799659653] [2021-05-02 15:00:44,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:00:44,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:00:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:44,043 INFO L87 Difference]: Start difference. First operand 526 states and 685 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 15:00:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:49,109 INFO L93 Difference]: Finished difference Result 533 states and 691 transitions. [2021-05-02 15:00:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:00:49,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 157 [2021-05-02 15:00:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:49,114 INFO L225 Difference]: With dead ends: 533 [2021-05-02 15:00:49,114 INFO L226 Difference]: Without dead ends: 530 [2021-05-02 15:00:49,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:49,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-02 15:00:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 529. [2021-05-02 15:00:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 294 states have (on average 1.1156462585034013) internal successors, (328), 296 states have internal predecessors, (328), 180 states have call successors, (180), 55 states have call predecessors, (180), 54 states have return successors, (178), 177 states have call predecessors, (178), 178 states have call successors, (178) [2021-05-02 15:00:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 686 transitions. [2021-05-02 15:00:49,211 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 686 transitions. Word has length 157 [2021-05-02 15:00:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:49,211 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 686 transitions. [2021-05-02 15:00:49,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 15:00:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 686 transitions. [2021-05-02 15:00:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 15:00:49,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:49,219 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1] [2021-05-02 15:00:49,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:49,433 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 7 times [2021-05-02 15:00:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:49,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490942654] [2021-05-02 15:00:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:49,453 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:49,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857601816] [2021-05-02 15:00:49,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-02 15:00:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:49,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,542 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-02 15:00:50,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 133 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-05-02 15:00:51,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:51,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490942654] [2021-05-02 15:00:51,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:51,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857601816] [2021-05-02 15:00:51,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857601816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:51,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:51,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 15:00:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296635458] [2021-05-02 15:00:51,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 15:00:51,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 15:00:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:00:51,674 INFO L87 Difference]: Start difference. First operand 529 states and 686 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) [2021-05-02 15:00:53,757 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-02 15:00:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:54,555 INFO L93 Difference]: Finished difference Result 578 states and 752 transitions. [2021-05-02 15:00:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 15:00:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) Word has length 160 [2021-05-02 15:00:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:54,559 INFO L225 Difference]: With dead ends: 578 [2021-05-02 15:00:54,559 INFO L226 Difference]: Without dead ends: 576 [2021-05-02 15:00:54,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1952.5ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-05-02 15:00:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-05-02 15:00:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 573. [2021-05-02 15:00:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 317 states have (on average 1.1198738170347002) internal successors, (355), 320 states have internal predecessors, (355), 197 states have call successors, (197), 59 states have call predecessors, (197), 58 states have return successors, (195), 193 states have call predecessors, (195), 195 states have call successors, (195) [2021-05-02 15:00:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 747 transitions. [2021-05-02 15:00:54,639 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 747 transitions. Word has length 160 [2021-05-02 15:00:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:54,639 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 747 transitions. [2021-05-02 15:00:54,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) [2021-05-02 15:00:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 747 transitions. [2021-05-02 15:00:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 15:00:54,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:54,640 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1] [2021-05-02 15:00:54,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 15:00:54,856 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 8 times [2021-05-02 15:00:54,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:54,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671394637] [2021-05-02 15:00:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:54,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:54,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344516321] [2021-05-02 15:00:54,865 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:54,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:54,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 15:00:54,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:55,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,472 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 15:00:56,732 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-02 15:00:56,994 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-02 15:00:56,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:03,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:03,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:05,154 WARN L838 $PredicateComparison]: unable to prove that (or (= |c___VERIFIER_assert_#in~cond| 1) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~x~0_BEFORE_CALL_422 Int) (aux_div_v_main_~y~0_BEFORE_CALL_371_39 Int)) (let ((.cse0 (* 2 v_main_~x~0_BEFORE_CALL_422)) (.cse1 (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (div (+ (* v_main_~x~0_BEFORE_CALL_422 (- 1)) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 1))) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 2)))))) (and (not (= (+ (* 2 aux_div_v_main_~y~0_BEFORE_CALL_371_39) .cse0) (* 4 .cse1))) (< (* 8 .cse1) (* 3 v_main_~x~0_BEFORE_CALL_422)) (= .cse0 (* 6 .cse1))))))) is different from false [2021-05-02 15:01:05,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:05,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:34,688 WARN L205 SmtUtils]: Spent 12.17 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:01:34,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:34,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:36,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:38,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:38,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:40,759 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_422 Int) (aux_div_v_main_~y~0_BEFORE_CALL_371_39 Int)) (let ((.cse0 (* 2 v_main_~x~0_BEFORE_CALL_422)) (.cse1 (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (div (+ (* v_main_~x~0_BEFORE_CALL_422 (- 1)) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 1))) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 2)))))) (and (not (= (+ (* 2 aux_div_v_main_~y~0_BEFORE_CALL_371_39) .cse0) (* 4 .cse1))) (< (* 8 .cse1) (* 3 v_main_~x~0_BEFORE_CALL_422)) (= .cse0 (* 6 .cse1))))) is different from false [2021-05-02 15:01:42,766 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_422 Int) (aux_div_v_main_~y~0_BEFORE_CALL_371_39 Int)) (let ((.cse0 (* 2 v_main_~x~0_BEFORE_CALL_422)) (.cse1 (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (div (+ (* v_main_~x~0_BEFORE_CALL_422 (- 1)) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 1))) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 2)))))) (and (not (= (+ (* 2 aux_div_v_main_~y~0_BEFORE_CALL_371_39) .cse0) (* 4 .cse1))) (< (* 8 .cse1) (* 3 v_main_~x~0_BEFORE_CALL_422)) (= .cse0 (* 6 .cse1))))) is different from true [2021-05-02 15:01:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 147 proven. 163 refuted. 4 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-02 15:01:42,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671394637] [2021-05-02 15:01:42,767 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344516321] [2021-05-02 15:01:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344516321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:42,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:42,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 15:01:42,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788172472] [2021-05-02 15:01:42,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 15:01:42,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 15:01:42,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=360, Unknown=7, NotChecked=78, Total=506 [2021-05-02 15:01:42,768 INFO L87 Difference]: Start difference. First operand 573 states and 747 transitions. Second operand has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-02 15:01:47,074 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 15:01:47,775 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-05-02 15:01:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:48,565 INFO L93 Difference]: Finished difference Result 615 states and 809 transitions. [2021-05-02 15:01:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 15:01:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2021-05-02 15:01:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:48,570 INFO L225 Difference]: With dead ends: 615 [2021-05-02 15:01:48,570 INFO L226 Difference]: Without dead ends: 613 [2021-05-02 15:01:48,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 34114.3ms TimeCoverageRelationStatistics Valid=113, Invalid=818, Unknown=7, NotChecked=118, Total=1056 [2021-05-02 15:01:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-05-02 15:01:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 587. [2021-05-02 15:01:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 325 states have (on average 1.123076923076923) internal successors, (365), 329 states have internal predecessors, (365), 202 states have call successors, (202), 60 states have call predecessors, (202), 59 states have return successors, (200), 197 states have call predecessors, (200), 200 states have call successors, (200) [2021-05-02 15:01:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 767 transitions. [2021-05-02 15:01:48,654 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 767 transitions. Word has length 160 [2021-05-02 15:01:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:48,655 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 767 transitions. [2021-05-02 15:01:48,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-02 15:01:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 767 transitions. [2021-05-02 15:01:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 15:01:48,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:48,657 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2021-05-02 15:01:48,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 15:01:48,873 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:48,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1959268472, now seen corresponding path program 2 times [2021-05-02 15:01:48,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:48,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639399818] [2021-05-02 15:01:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:48,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:48,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679961362] [2021-05-02 15:01:48,882 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:48,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:01:48,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:48,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:01:48,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:49,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:49,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 77 proven. 107 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2021-05-02 15:01:50,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:50,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639399818] [2021-05-02 15:01:50,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:50,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679961362] [2021-05-02 15:01:50,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679961362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:50,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:50,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 15:01:50,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498094868] [2021-05-02 15:01:50,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 15:01:50,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 15:01:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:01:50,379 INFO L87 Difference]: Start difference. First operand 587 states and 767 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 15:01:52,843 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-02 15:01:53,080 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 15:01:53,341 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 15:01:54,203 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-02 15:01:54,631 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-02 15:01:54,870 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-02 15:01:55,698 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-02 15:01:55,904 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-05-02 15:01:57,198 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-02 15:01:58,009 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-02 15:01:58,433 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-02 15:01:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:58,439 INFO L93 Difference]: Finished difference Result 701 states and 949 transitions. [2021-05-02 15:01:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 15:01:58,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 165 [2021-05-02 15:01:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:58,444 INFO L225 Difference]: With dead ends: 701 [2021-05-02 15:01:58,444 INFO L226 Difference]: Without dead ends: 697 [2021-05-02 15:01:58,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 4545.7ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 15:01:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-05-02 15:01:58,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 664. [2021-05-02 15:01:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 358 states have (on average 1.1368715083798884) internal successors, (407), 363 states have internal predecessors, (407), 245 states have call successors, (245), 61 states have call predecessors, (245), 60 states have return successors, (242), 239 states have call predecessors, (242), 242 states have call successors, (242) [2021-05-02 15:01:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 894 transitions. [2021-05-02 15:01:58,521 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 894 transitions. Word has length 165 [2021-05-02 15:01:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:58,521 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 894 transitions. [2021-05-02 15:01:58,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 15:01:58,521 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 894 transitions. [2021-05-02 15:01:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 15:01:58,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:58,523 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2021-05-02 15:01:58,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:58,738 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash 86569686, now seen corresponding path program 3 times [2021-05-02 15:01:58,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:58,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847314247] [2021-05-02 15:01:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:58,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:58,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53728661] [2021-05-02 15:01:58,743 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true