/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:52:39,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:52:39,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:52:39,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:52:39,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:52:39,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:52:39,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:52:39,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:52:39,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:52:39,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:52:39,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:52:39,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:52:39,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:52:39,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:52:39,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:52:39,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:52:39,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:52:40,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:52:40,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:52:40,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:52:40,008 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 14:52:40,052 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:52:40,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:52:40,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:52:40,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:52:40,054 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:52:40,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:52:40,054 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:52:40,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:52:40,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:52:40,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:52:40,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:52:40,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:52:40,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:52:40,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:52:40,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:52:40,056 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:52:40,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:52:40,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:52:40,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:52:40,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:52:40,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:52:40,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:52:40,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:52:40,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:52:40,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:52:40,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:52:40,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:52:40,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:52:40,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:52:40,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:52:40,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:52:40,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:52:40,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:52:40,419 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:52:40,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-05-02 14:52:40,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59ca97713/b2a5e4bd08d0405d946e1dbf04a3ac1b/FLAGda7a9e108 [2021-05-02 14:52:41,013 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:52:41,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-05-02 14:52:41,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59ca97713/b2a5e4bd08d0405d946e1dbf04a3ac1b/FLAGda7a9e108 [2021-05-02 14:52:41,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59ca97713/b2a5e4bd08d0405d946e1dbf04a3ac1b [2021-05-02 14:52:41,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:52:41,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:52:41,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:52:41,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:52:41,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:52:41,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df71b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41, skipping insertion in model container [2021-05-02 14:52:41,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:52:41,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:52:41,615 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_valuebound10.c[490,503] [2021-05-02 14:52:41,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:52:41,654 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:52:41,663 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_valuebound10.c[490,503] [2021-05-02 14:52:41,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:52:41,693 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:52:41,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41 WrapperNode [2021-05-02 14:52:41,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:52:41,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:52:41,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:52:41,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:52:41,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (1/1) ... [2021-05-02 14:52:41,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:52:41,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:52:41,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:52:41,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:52:41,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (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 14:52:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:52:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:52:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:52:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:52:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:52:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:52:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:52:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:52:41,892 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:52:41,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:52:41,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:52:41,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:52:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:52:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:52:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:52:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:52:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:52:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:52:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:52:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:52:42,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:52:42,125 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:52:42,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:52:42 BoogieIcfgContainer [2021-05-02 14:52:42,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:52:42,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:52:42,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:52:42,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:52:42,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:52:41" (1/3) ... [2021-05-02 14:52:42,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3264a4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:52:42, skipping insertion in model container [2021-05-02 14:52:42,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:41" (2/3) ... [2021-05-02 14:52:42,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3264a4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:52:42, skipping insertion in model container [2021-05-02 14:52:42,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:52:42" (3/3) ... [2021-05-02 14:52:42,131 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2021-05-02 14:52:42,134 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:52:42,136 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:52:42,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:52:42,163 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:52:42,163 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:52:42,163 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:52:42,163 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:52:42,163 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:52:42,163 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:52:42,163 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:52:42,163 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:52:42,174 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 14:52:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:52:42,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:42,178 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 14:52:42,178 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:42,182 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-02 14:52:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:42,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834380803] [2021-05-02 14:52:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:52:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:52:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:52:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:52:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:52:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 14:52:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 14:52:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,337 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 14:52:42,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:42,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834380803] [2021-05-02 14:52:42,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834380803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:52:42,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:52:42,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:52:42,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671809396] [2021-05-02 14:52:42,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:52:42,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:52:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:52:42,352 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 14:52:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:42,455 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-02 14:52:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:52:42,457 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 14:52:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:42,462 INFO L225 Difference]: With dead ends: 73 [2021-05-02 14:52:42,462 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:52:42,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:52:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:52:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:52:42,490 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 14:52:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 14:52:42,492 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 14:52:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:42,493 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 14:52:42,493 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 14:52:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 14:52:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:52:42,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:42,495 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 14:52:42,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:52:42,495 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-02 14:52:42,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:42,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203179486] [2021-05-02 14:52:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:42,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:42,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616370651] [2021-05-02 14:52:42,513 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 14:52:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:42,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:52:42,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:42,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:42,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:42,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:42,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:42,970 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 14:52:42,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203179486] [2021-05-02 14:52:42,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616370651] [2021-05-02 14:52:42,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616370651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:42,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:42,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:52:42,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626094136] [2021-05-02 14:52:42,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:52:42,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:42,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:52:42,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:52:42,975 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 14:52:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:43,148 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-02 14:52:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:52:43,161 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 14:52:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:43,162 INFO L225 Difference]: With dead ends: 52 [2021-05-02 14:52:43,163 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:52:43,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:52:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:52:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 14:52:43,193 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 14:52:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:52:43,194 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 14:52:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:43,194 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:52:43,195 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 14:52:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:52:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:52:43,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:43,196 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 14:52:43,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:52:43,397 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-02 14:52:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:43,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027738257] [2021-05-02 14:52:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:43,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:43,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515250425] [2021-05-02 14:52:43,420 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 14:52:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:52:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:43,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:43,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:43,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:43,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:43,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:43,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:43,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:43,669 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 14:52:43,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:43,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027738257] [2021-05-02 14:52:43,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:43,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515250425] [2021-05-02 14:52:43,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515250425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:43,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:43,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:43,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041516291] [2021-05-02 14:52:43,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:43,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:43,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:43,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:43,671 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 14:52:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:43,833 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-02 14:52:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:43,834 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 14:52:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:43,834 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:52:43,835 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:52:43,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:52:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 14:52:43,841 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 14:52:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 14:52:43,842 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 14:52:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:43,842 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 14:52:43,842 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 14:52:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 14:52:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:52:43,843 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:43,843 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 14:52:44,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:44,060 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-02 14:52:44,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:44,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399374863] [2021-05-02 14:52:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:44,072 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:44,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824908654] [2021-05-02 14:52:44,073 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 14:52:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:52:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:44,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,331 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 14:52:44,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:44,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399374863] [2021-05-02 14:52:44,332 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:44,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824908654] [2021-05-02 14:52:44,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824908654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:44,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:44,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:44,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172307868] [2021-05-02 14:52:44,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:44,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:44,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:44,333 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 14:52:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:44,481 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 14:52:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:44,481 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 14:52:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:44,483 INFO L225 Difference]: With dead ends: 56 [2021-05-02 14:52:44,483 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:52:44,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:52:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:52:44,491 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 14:52:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 14:52:44,492 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 14:52:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:44,508 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 14:52:44,509 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 14:52:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 14:52:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:52:44,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:44,516 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 14:52:44,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:44,718 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:44,718 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-02 14:52:44,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:44,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969924479] [2021-05-02 14:52:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:44,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:44,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742904244] [2021-05-02 14:52:44,735 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 14:52:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:52:44,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:44,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:44,977 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 14:52:44,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:44,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969924479] [2021-05-02 14:52:44,977 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:44,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742904244] [2021-05-02 14:52:44,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742904244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:44,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:44,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521161034] [2021-05-02 14:52:44,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:44,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:44,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:44,979 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 14:52:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:45,090 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-02 14:52:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:45,090 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 14:52:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:45,091 INFO L225 Difference]: With dead ends: 60 [2021-05-02 14:52:45,091 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 14:52:45,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 14:52:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 14:52:45,098 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 14:52:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 14:52:45,099 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 14:52:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:45,099 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 14:52:45,099 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 14:52:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 14:52:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:52:45,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:45,100 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 14:52:45,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:45,319 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:45,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:45,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-02 14:52:45,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:45,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377904456] [2021-05-02 14:52:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:45,329 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:45,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499915271] [2021-05-02 14:52:45,329 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 14:52:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:45,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:52:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:45,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:45,607 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 14:52:45,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:45,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377904456] [2021-05-02 14:52:45,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:45,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499915271] [2021-05-02 14:52:45,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499915271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:45,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:45,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:52:45,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931855205] [2021-05-02 14:52:45,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:52:45,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:52:45,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:52:45,609 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 14:52:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:47,798 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-02 14:52:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:52:47,799 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 14:52:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:47,800 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:52:47,800 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 14:52:47,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 14:52:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 14:52:47,807 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 14:52:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 14:52:47,807 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 14:52:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:47,808 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 14:52:47,808 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 14:52:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 14:52:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 14:52:47,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:47,809 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 14:52:48,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:52:48,023 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:48,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:48,023 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-02 14:52:48,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:48,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541933654] [2021-05-02 14:52:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:48,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:48,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690836369] [2021-05-02 14:52:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:52:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:48,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:52:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:48,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,267 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 14:52:48,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:48,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541933654] [2021-05-02 14:52:48,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:48,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690836369] [2021-05-02 14:52:48,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690836369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:48,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:48,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:52:48,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543292351] [2021-05-02 14:52:48,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:52:48,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:48,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:52:48,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:52:48,269 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 14:52:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:48,396 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-05-02 14:52:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:52:48,397 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 14:52:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:48,398 INFO L225 Difference]: With dead ends: 91 [2021-05-02 14:52:48,398 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 14:52:48,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:52:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 14:52:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 14:52:48,426 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 14:52:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:52:48,427 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 14:52:48,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:48,428 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:52:48,428 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 14:52:48,428 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:52:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:52:48,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:48,429 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 14:52:48,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:48,645 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-02 14:52:48,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:48,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885135946] [2021-05-02 14:52:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:48,653 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:48,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106883474] [2021-05-02 14:52:48,654 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 14:52:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:48,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:52:48,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:48,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:48,817 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 14:52:48,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:48,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885135946] [2021-05-02 14:52:48,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:48,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106883474] [2021-05-02 14:52:48,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106883474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:48,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:48,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:52:48,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745282662] [2021-05-02 14:52:48,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:52:48,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:52:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:52:48,820 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 14:52:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:48,955 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2021-05-02 14:52:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:48,956 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 14:52:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:48,959 INFO L225 Difference]: With dead ends: 124 [2021-05-02 14:52:48,959 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:52:48,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:52:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 14:52:48,986 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 14:52:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 14:52:48,991 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 14:52:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:48,992 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 14:52:48,992 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 14:52:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 14:52:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 14:52:48,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:48,995 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 14:52:49,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:49,209 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:49,210 INFO L82 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2021-05-02 14:52:49,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:49,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281001002] [2021-05-02 14:52:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:49,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:49,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378506255] [2021-05-02 14:52:49,218 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 14:52:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:52:49,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:49,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:49,524 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 14:52:49,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:49,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281001002] [2021-05-02 14:52:49,525 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:49,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378506255] [2021-05-02 14:52:49,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378506255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:49,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:49,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:52:49,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721716628] [2021-05-02 14:52:49,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:52:49,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:52:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:52:49,526 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 14:52:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:49,705 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2021-05-02 14:52:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:52:49,706 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 14:52:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:49,707 INFO L225 Difference]: With dead ends: 150 [2021-05-02 14:52:49,707 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 14:52:49,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:52:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 14:52:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 14:52:49,724 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 14:52:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 14:52:49,725 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 14:52:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:49,726 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 14:52:49,726 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 14:52:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 14:52:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:52:49,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:49,727 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 14:52:49,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:52:49,945 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2021-05-02 14:52:49,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:49,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028984497] [2021-05-02 14:52:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:49,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:49,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391412445] [2021-05-02 14:52:49,953 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 14:52:50,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:52:50,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:50,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:52:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:50,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,212 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 14:52:50,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:50,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028984497] [2021-05-02 14:52:50,213 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:50,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391412445] [2021-05-02 14:52:50,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391412445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:50,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:50,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:52:50,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503973894] [2021-05-02 14:52:50,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:52:50,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:52:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:52:50,214 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 14:52:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:50,413 INFO L93 Difference]: Finished difference Result 152 states and 213 transitions. [2021-05-02 14:52:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:52:50,413 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 14:52:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:50,415 INFO L225 Difference]: With dead ends: 152 [2021-05-02 14:52:50,415 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 14:52:50,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 14:52:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 14:52:50,429 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 14:52:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 14:52:50,430 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 14:52:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:50,431 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 14:52:50,431 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 14:52:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 14:52:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:52:50,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:50,432 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 14:52:50,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:50,648 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2021-05-02 14:52:50,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:50,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374609279] [2021-05-02 14:52:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:50,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:50,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369019434] [2021-05-02 14:52:50,656 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 14:52:50,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:52:50,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:50,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:52:50,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:50,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:50,983 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 14:52:50,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:50,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374609279] [2021-05-02 14:52:50,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:50,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369019434] [2021-05-02 14:52:50,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369019434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:50,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:50,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:52:50,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027808142] [2021-05-02 14:52:50,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:52:50,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:52:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:52:50,985 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 14:52:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:51,311 INFO L93 Difference]: Finished difference Result 156 states and 216 transitions. [2021-05-02 14:52:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:52:51,311 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 14:52:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:51,312 INFO L225 Difference]: With dead ends: 156 [2021-05-02 14:52:51,313 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 14:52:51,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:52:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 14:52:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 14:52:51,326 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 14:52:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-02 14:52:51,327 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-02 14:52:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:51,328 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-02 14:52:51,328 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 14:52:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-02 14:52:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:52:51,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:51,328 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 14:52:51,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:51,544 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:51,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-02 14:52:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:51,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057246202] [2021-05-02 14:52:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:51,551 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:51,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528782992] [2021-05-02 14:52:51,551 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 14:52:51,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:52:51,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:51,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:52:51,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:51,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:51,819 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 14:52:51,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:51,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057246202] [2021-05-02 14:52:51,819 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:51,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528782992] [2021-05-02 14:52:51,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528782992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:51,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:51,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:52:51,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383683559] [2021-05-02 14:52:51,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:52:51,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:51,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:52:51,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:51,821 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 14:52:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:52,121 INFO L93 Difference]: Finished difference Result 215 states and 319 transitions. [2021-05-02 14:52:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:52:52,121 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 14:52:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:52,122 INFO L225 Difference]: With dead ends: 215 [2021-05-02 14:52:52,122 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 14:52:52,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:52:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 14:52:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2021-05-02 14:52:52,140 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 14:52:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-05-02 14:52:52,141 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 89 [2021-05-02 14:52:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:52,141 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-05-02 14:52:52,142 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 14:52:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-05-02 14:52:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 14:52:52,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:52,142 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 14:52:52,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:52:52,358 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-02 14:52:52,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:52,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502379101] [2021-05-02 14:52:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:52,365 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:52,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771749221] [2021-05-02 14:52:52,365 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 14:52:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 14:52:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:52,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:52,779 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 14:52:52,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:52,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502379101] [2021-05-02 14:52:52,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:52,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771749221] [2021-05-02 14:52:52,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771749221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:52,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:52,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:52:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650817762] [2021-05-02 14:52:52,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:52:52,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:52:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:52:52,780 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 14:52:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:53,202 INFO L93 Difference]: Finished difference Result 221 states and 320 transitions. [2021-05-02 14:52:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:52:53,202 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 14:52:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:53,203 INFO L225 Difference]: With dead ends: 221 [2021-05-02 14:52:53,203 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 14:52:53,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:52:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 14:52:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 14:52:53,222 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 14:52:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 315 transitions. [2021-05-02 14:52:53,223 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 315 transitions. Word has length 91 [2021-05-02 14:52:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:53,224 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 315 transitions. [2021-05-02 14:52:53,224 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 14:52:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 315 transitions. [2021-05-02 14:52:53,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 14:52:53,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:53,224 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 14:52:53,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:52:53,440 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 4 times [2021-05-02 14:52:53,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:53,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159787440] [2021-05-02 14:52:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:53,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:53,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285514907] [2021-05-02 14:52:53,452 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 14:52:53,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:52:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:52:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:53,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:53,625 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 14:52:53,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:53,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159787440] [2021-05-02 14:52:53,625 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:53,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285514907] [2021-05-02 14:52:53,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285514907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:52:53,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:52:53,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:52:53,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779201957] [2021-05-02 14:52:53,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:52:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:52:53,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:52:53,626 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 14:52:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:53,705 INFO L93 Difference]: Finished difference Result 265 states and 384 transitions. [2021-05-02 14:52:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:52:53,706 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 14:52:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:53,707 INFO L225 Difference]: With dead ends: 265 [2021-05-02 14:52:53,707 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 14:52:53,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:52:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 14:52:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-05-02 14:52:53,724 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 14:52:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 257 transitions. [2021-05-02 14:52:53,725 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 257 transitions. Word has length 100 [2021-05-02 14:52:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:53,726 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 257 transitions. [2021-05-02 14:52:53,726 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 14:52:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 257 transitions. [2021-05-02 14:52:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 14:52:53,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:53,727 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 14:52:53,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:52:53,942 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2021-05-02 14:52:53,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:53,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447670863] [2021-05-02 14:52:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:53,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:53,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654345107] [2021-05-02 14:52:53,948 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 14:52:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:54,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 14:52:54,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:54,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:54,459 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 14:52:54,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:54,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447670863] [2021-05-02 14:52:54,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:54,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654345107] [2021-05-02 14:52:54,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654345107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:54,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:54,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:52:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151093636] [2021-05-02 14:52:54,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:52:54,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:54,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:52:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:52:54,461 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 14:52:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:59,057 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2021-05-02 14:52:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:52:59,058 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 14:52:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:59,059 INFO L225 Difference]: With dead ends: 192 [2021-05-02 14:52:59,059 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 14:52:59,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:52:59,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 14:52:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-05-02 14:52:59,093 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 14:52:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2021-05-02 14:52:59,094 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 107 [2021-05-02 14:52:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:59,096 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2021-05-02 14:52:59,096 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 14:52:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2021-05-02 14:52:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 14:52:59,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:59,097 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 14:52:59,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:59,297 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1483033219, now seen corresponding path program 3 times [2021-05-02 14:52:59,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:59,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115071665] [2021-05-02 14:52:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:59,306 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:59,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004711236] [2021-05-02 14:52:59,306 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 14:52:59,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:52:59,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:59,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:52:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:59,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:59,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:59,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:59,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:59,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:59,604 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 14:52:59,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:59,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115071665] [2021-05-02 14:52:59,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:59,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004711236] [2021-05-02 14:52:59,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004711236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:59,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:59,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:52:59,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765887333] [2021-05-02 14:52:59,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:52:59,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:59,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:52:59,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:52:59,606 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 14:52:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:59,707 INFO L93 Difference]: Finished difference Result 164 states and 221 transitions. [2021-05-02 14:52:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:52:59,708 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 14:52:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:59,709 INFO L225 Difference]: With dead ends: 164 [2021-05-02 14:52:59,709 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 14:52:59,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 14:52:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2021-05-02 14:52:59,722 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 14:52:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2021-05-02 14:52:59,723 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 111 [2021-05-02 14:52:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:59,723 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2021-05-02 14:52:59,723 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 14:52:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2021-05-02 14:52:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 14:52:59,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:59,724 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 14:52:59,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:52:59,941 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 2 times [2021-05-02 14:52:59,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:59,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285988447] [2021-05-02 14:52:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:59,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:59,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189523978] [2021-05-02 14:52:59,948 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 14:53:00,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:53:00,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 14:53:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:00,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:00,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:01,609 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-02 14:53:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:01,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:01,758 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 14:53:01,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:01,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285988447] [2021-05-02 14:53:01,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:01,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189523978] [2021-05-02 14:53:01,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189523978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:01,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:01,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:53:01,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369511767] [2021-05-02 14:53:01,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:53:01,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:01,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:53:01,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:53:01,760 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 14:53:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:02,538 INFO L93 Difference]: Finished difference Result 174 states and 230 transitions. [2021-05-02 14:53:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:53:02,539 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 14:53:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:02,540 INFO L225 Difference]: With dead ends: 174 [2021-05-02 14:53:02,540 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 14:53:02,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1688.7ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:53:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 14:53:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-05-02 14:53:02,556 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 14:53:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 224 transitions. [2021-05-02 14:53:02,556 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 224 transitions. Word has length 113 [2021-05-02 14:53:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:02,557 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 224 transitions. [2021-05-02 14:53:02,557 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 14:53:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 224 transitions. [2021-05-02 14:53:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 14:53:02,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:02,558 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 14:53:02,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:53:02,774 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:02,774 INFO L82 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 3 times [2021-05-02 14:53:02,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:02,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568722702] [2021-05-02 14:53:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:02,793 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:02,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952479930] [2021-05-02 14:53:02,794 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 14:53:02,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:53:02,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:02,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:53:02,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:02,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:02,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,040 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 14:53:03,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:03,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568722702] [2021-05-02 14:53:03,040 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:03,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952479930] [2021-05-02 14:53:03,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952479930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:03,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:03,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:53:03,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024402819] [2021-05-02 14:53:03,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:53:03,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:03,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:53:03,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:53:03,042 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 14:53:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:03,262 INFO L93 Difference]: Finished difference Result 215 states and 301 transitions. [2021-05-02 14:53:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:53:03,263 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 14:53:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:03,264 INFO L225 Difference]: With dead ends: 215 [2021-05-02 14:53:03,264 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 14:53:03,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:53:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 14:53:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-05-02 14:53:03,283 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 14:53:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 259 transitions. [2021-05-02 14:53:03,284 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 259 transitions. Word has length 116 [2021-05-02 14:53:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:03,285 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 259 transitions. [2021-05-02 14:53:03,285 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 14:53:03,285 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 259 transitions. [2021-05-02 14:53:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 14:53:03,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:03,286 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 14:53:03,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:53:03,501 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 2 times [2021-05-02 14:53:03,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:03,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161391953] [2021-05-02 14:53:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:03,507 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:03,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473470178] [2021-05-02 14:53:03,507 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 14:53:03,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:53:03,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:03,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:53:03,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:03,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:03,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:04,209 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 14:53:04,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:04,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161391953] [2021-05-02 14:53:04,210 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:04,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473470178] [2021-05-02 14:53:04,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473470178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:04,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:04,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:53:04,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412868267] [2021-05-02 14:53:04,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:53:04,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:04,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:53:04,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:53:04,211 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 14:53:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:06,518 INFO L93 Difference]: Finished difference Result 267 states and 380 transitions. [2021-05-02 14:53:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 14:53:06,518 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 14:53:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:06,519 INFO L225 Difference]: With dead ends: 267 [2021-05-02 14:53:06,519 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 14:53:06,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1279.1ms TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 14:53:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 14:53:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2021-05-02 14:53:06,546 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 14:53:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2021-05-02 14:53:06,547 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 122 [2021-05-02 14:53:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:06,547 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2021-05-02 14:53:06,547 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 14:53:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2021-05-02 14:53:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 14:53:06,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:06,548 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 14:53:06,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:06,765 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:06,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 3 times [2021-05-02 14:53:06,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:06,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917682090] [2021-05-02 14:53:06,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:06,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:06,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90489968] [2021-05-02 14:53:06,775 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 14:53:06,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:53:06,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:06,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 14:53:06,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:06,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:06,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:07,192 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 14:53:07,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:07,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917682090] [2021-05-02 14:53:07,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:07,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90489968] [2021-05-02 14:53:07,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90489968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:07,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:07,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:53:07,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520707606] [2021-05-02 14:53:07,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:53:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:53:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:53:07,193 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 14:53:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:07,907 INFO L93 Difference]: Finished difference Result 301 states and 423 transitions. [2021-05-02 14:53:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:53:07,908 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 14:53:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:07,909 INFO L225 Difference]: With dead ends: 301 [2021-05-02 14:53:07,909 INFO L226 Difference]: Without dead ends: 299 [2021-05-02 14:53:07,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:53:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-02 14:53:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2021-05-02 14:53:07,941 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 14:53:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 418 transitions. [2021-05-02 14:53:07,942 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 418 transitions. Word has length 127 [2021-05-02 14:53:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:07,943 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 418 transitions. [2021-05-02 14:53:07,943 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 14:53:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 418 transitions. [2021-05-02 14:53:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 14:53:07,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:07,944 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 14:53:08,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:08,165 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:08,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 4 times [2021-05-02 14:53:08,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:08,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116539171] [2021-05-02 14:53:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:08,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:08,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130408681] [2021-05-02 14:53:08,172 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 14:53:08,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:53:08,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:08,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 14:53:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:08,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 121 proven. 109 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-05-02 14:53:08,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:08,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116539171] [2021-05-02 14:53:08,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:08,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130408681] [2021-05-02 14:53:08,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130408681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:08,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:08,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:53:08,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735526910] [2021-05-02 14:53:08,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:53:08,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:53:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:53:08,992 INFO L87 Difference]: Start difference. First operand 296 states and 418 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 14:53:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:15,647 INFO L93 Difference]: Finished difference Result 308 states and 428 transitions. [2021-05-02 14:53:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:53:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-02 14:53:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:15,649 INFO L225 Difference]: With dead ends: 308 [2021-05-02 14:53:15,650 INFO L226 Difference]: Without dead ends: 306 [2021-05-02 14:53:15,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:53:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-02 14:53:15,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2021-05-02 14:53:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 159 states have internal predecessors, (181), 123 states have call successors, (123), 24 states have call predecessors, (123), 23 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:53:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2021-05-02 14:53:15,681 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 129 [2021-05-02 14:53:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:15,682 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2021-05-02 14:53:15,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 14:53:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2021-05-02 14:53:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 14:53:15,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:15,683 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 14:53:15,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:53:15,899 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:15,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 5 times [2021-05-02 14:53:15,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:15,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925571357] [2021-05-02 14:53:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:15,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:15,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552679319] [2021-05-02 14:53:15,909 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 14:53:16,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 14:53:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:16,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 14:53:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:16,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:16,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:17,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:17,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:17,186 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 14:53:17,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:17,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925571357] [2021-05-02 14:53:17,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:17,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552679319] [2021-05-02 14:53:17,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552679319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:17,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:17,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 14:53:17,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427528896] [2021-05-02 14:53:17,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:53:17,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:53:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:53:17,188 INFO L87 Difference]: Start difference. First operand 304 states and 424 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 14:53:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:18,547 INFO L93 Difference]: Finished difference Result 327 states and 443 transitions. [2021-05-02 14:53:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:53:18,548 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 14:53:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:18,549 INFO L225 Difference]: With dead ends: 327 [2021-05-02 14:53:18,550 INFO L226 Difference]: Without dead ends: 325 [2021-05-02 14:53:18,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1168.5ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:53:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-02 14:53:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 320. [2021-05-02 14:53:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 171 states have internal predecessors, (193), 123 states have call successors, (123), 28 states have call predecessors, (123), 27 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:53:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 436 transitions. [2021-05-02 14:53:18,589 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 436 transitions. Word has length 132 [2021-05-02 14:53:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:18,591 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 436 transitions. [2021-05-02 14:53:18,591 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 14:53:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 436 transitions. [2021-05-02 14:53:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 14:53:18,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:18,593 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 14:53:18,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:53:18,809 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 4 times [2021-05-02 14:53:18,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:18,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032373593] [2021-05-02 14:53:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:18,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:18,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437735041] [2021-05-02 14:53:18,815 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 14:53:18,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:53:18,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 14:53:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:18,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:18,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:18,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:18,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:18,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-05-02 14:53:19,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:19,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032373593] [2021-05-02 14:53:19,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:19,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437735041] [2021-05-02 14:53:19,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437735041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:19,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:19,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:53:19,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764233976] [2021-05-02 14:53:19,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:53:19,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:19,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:53:19,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:53:19,347 INFO L87 Difference]: Start difference. First operand 320 states and 436 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-02 14:53:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:20,042 INFO L93 Difference]: Finished difference Result 360 states and 494 transitions. [2021-05-02 14:53:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:53:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2021-05-02 14:53:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:20,044 INFO L225 Difference]: With dead ends: 360 [2021-05-02 14:53:20,044 INFO L226 Difference]: Without dead ends: 357 [2021-05-02 14:53:20,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:53:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-02 14:53:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 355. [2021-05-02 14:53:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 186 states have (on average 1.1451612903225807) internal successors, (213), 188 states have internal predecessors, (213), 139 states have call successors, (139), 30 states have call predecessors, (139), 29 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 14:53:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 488 transitions. [2021-05-02 14:53:20,096 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 488 transitions. Word has length 135 [2021-05-02 14:53:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:20,096 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 488 transitions. [2021-05-02 14:53:20,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-02 14:53:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 488 transitions. [2021-05-02 14:53:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 14:53:20,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:20,097 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 14:53:20,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:20,313 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 5 times [2021-05-02 14:53:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:20,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111418762] [2021-05-02 14:53:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:20,324 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:20,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760787168] [2021-05-02 14:53:20,325 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 14:53:20,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 14:53:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 14:53:20,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:20,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:21,779 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 14:53:21,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:21,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111418762] [2021-05-02 14:53:21,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:21,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760787168] [2021-05-02 14:53:21,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760787168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:21,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:21,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 14:53:21,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821582319] [2021-05-02 14:53:21,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 14:53:21,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:21,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 14:53:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:53:21,781 INFO L87 Difference]: Start difference. First operand 355 states and 488 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 14:53:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:25,019 INFO L93 Difference]: Finished difference Result 409 states and 558 transitions. [2021-05-02 14:53:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:53:25,020 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 14:53:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:25,023 INFO L225 Difference]: With dead ends: 409 [2021-05-02 14:53:25,023 INFO L226 Difference]: Without dead ends: 407 [2021-05-02 14:53:25,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:53:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-02 14:53:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 403. [2021-05-02 14:53:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 212 states have (on average 1.1462264150943395) internal successors, (243), 215 states have internal predecessors, (243), 156 states have call successors, (156), 35 states have call predecessors, (156), 34 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-02 14:53:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 552 transitions. [2021-05-02 14:53:25,068 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 552 transitions. Word has length 138 [2021-05-02 14:53:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:25,069 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 552 transitions. [2021-05-02 14:53:25,069 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 14:53:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 552 transitions. [2021-05-02 14:53:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 14:53:25,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:25,070 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 14:53:25,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 14:53:25,286 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:25,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash -206620137, now seen corresponding path program 1 times [2021-05-02 14:53:25,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:25,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520189174] [2021-05-02 14:53:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:25,301 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:25,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494633111] [2021-05-02 14:53:25,301 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 14:53:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:53:25,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 14:53:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:25,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:25,940 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 14:53:25,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:53:25,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520189174] [2021-05-02 14:53:25,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:53:25,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494633111] [2021-05-02 14:53:25,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494633111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:53:25,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:53:25,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:53:25,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205249107] [2021-05-02 14:53:25,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:53:25,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:53:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:53:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:53:25,942 INFO L87 Difference]: Start difference. First operand 403 states and 552 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 14:53:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:53:26,898 INFO L93 Difference]: Finished difference Result 417 states and 564 transitions. [2021-05-02 14:53:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:53:26,899 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 14:53:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:53:26,901 INFO L225 Difference]: With dead ends: 417 [2021-05-02 14:53:26,901 INFO L226 Difference]: Without dead ends: 413 [2021-05-02 14:53:26,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:53:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-02 14:53:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2021-05-02 14:53:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 218 states have (on average 1.1376146788990826) internal successors, (248), 220 states have internal predecessors, (248), 155 states have call successors, (155), 37 states have call predecessors, (155), 36 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2021-05-02 14:53:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 555 transitions. [2021-05-02 14:53:26,943 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 555 transitions. Word has length 143 [2021-05-02 14:53:26,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:53:26,943 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 555 transitions. [2021-05-02 14:53:26,944 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 14:53:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 555 transitions. [2021-05-02 14:53:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 14:53:26,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:53:26,945 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 14:53:27,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:53:27,161 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:53:27,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:53:27,162 INFO L82 PathProgramCache]: Analyzing trace with hash 391502270, now seen corresponding path program 6 times [2021-05-02 14:53:27,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:53:27,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033524597] [2021-05-02 14:53:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:53:27,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:53:27,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878463433] [2021-05-02 14:53:27,173 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 14:53:27,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:53:27,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:53:27,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 14:53:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:53:27,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:27,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:28,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:30,355 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 14:53:49,308 WARN L205 SmtUtils]: Spent 18.92 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 14:53:51,368 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* c_main_~x~0 c_main_~y~0 c_main_~p~0) (* c_main_~y~0 c_main_~y~0 c_main_~r~0) c_main_~a~0) (+ (* c_main_~y~0 c_main_~r~0) (* c_main_~y~0 c_main_~a~0) (* c_main_~x~0 c_main_~p~0))) (< c_main_~y~0 (* 2 c_main_~a~0)) (< c_main_~a~0 c_main_~y~0) (< (* c_main_~x~0 c_main_~y~0) 2147483647) (<= 0 c_main_~x~0) (<= c_main_~x~0 10) (= c_main_~p~0 1)) is different from false [2021-05-02 14:53:51,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:51,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:53,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:55,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:57,621 WARN L838 $PredicateComparison]: unable to prove that (or (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))))))) (= |c___VERIFIER_assert_#in~cond| 1)) is different from false [2021-05-02 14:53:57,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:57,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:53:59,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:01,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:03,829 WARN L838 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0)))))))) is different from false [2021-05-02 14:54:03,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:03,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:07,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:10,003 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0)))))) is different from false [2021-05-02 14:54:12,021 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0)))))) is different from true [2021-05-02 14:54:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 110 proven. 69 refuted. 0 times theorem prover too weak. 496 trivial. 18 not checked. [2021-05-02 14:54:12,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:12,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033524597] [2021-05-02 14:54:12,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:12,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878463433] [2021-05-02 14:54:12,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878463433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:12,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:12,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:54:12,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345938763] [2021-05-02 14:54:12,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:54:12,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:12,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:54:12,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=199, Unknown=5, NotChecked=124, Total=380 [2021-05-02 14:54:12,024 INFO L87 Difference]: Start difference. First operand 410 states and 555 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 14:54:25,831 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 14:55:24,516 WARN L205 SmtUtils]: Spent 14.42 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 14:55:30,817 WARN L838 $PredicateComparison]: unable to prove that (and (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))))))) is different from false [2021-05-02 14:55:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:32,889 INFO L93 Difference]: Finished difference Result 426 states and 573 transitions. [2021-05-02 14:55:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 14:55:32,891 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 14:55:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:32,905 INFO L225 Difference]: With dead ends: 426 [2021-05-02 14:55:32,905 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 14:55:32,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 58080.6ms TimeCoverageRelationStatistics Valid=77, Invalid=354, Unknown=9, NotChecked=210, Total=650 [2021-05-02 14:55:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 14:55:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 418. [2021-05-02 14:55:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 224 states have (on average 1.1339285714285714) internal successors, (254), 226 states have internal predecessors, (254), 157 states have call successors, (157), 38 states have call predecessors, (157), 36 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2021-05-02 14:55:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 565 transitions. [2021-05-02 14:55:32,999 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 565 transitions. Word has length 144 [2021-05-02 14:55:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:32,999 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 565 transitions. [2021-05-02 14:55:32,999 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 14:55:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 565 transitions. [2021-05-02 14:55:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 14:55:33,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:33,000 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 14:55:33,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 14:55:33,205 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 7 times [2021-05-02 14:55:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:33,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328475796] [2021-05-02 14:55:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:33,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:33,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471984535] [2021-05-02 14:55:33,212 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 14:55:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:33,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 14:55:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:33,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:34,619 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 14:55:34,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:34,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328475796] [2021-05-02 14:55:34,619 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:34,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471984535] [2021-05-02 14:55:34,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471984535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:34,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:34,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 14:55:34,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605463179] [2021-05-02 14:55:34,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 14:55:34,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 14:55:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:55:34,621 INFO L87 Difference]: Start difference. First operand 418 states and 565 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 14:55:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:35,925 INFO L93 Difference]: Finished difference Result 456 states and 614 transitions. [2021-05-02 14:55:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:55:35,926 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 14:55:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:35,928 INFO L225 Difference]: With dead ends: 456 [2021-05-02 14:55:35,928 INFO L226 Difference]: Without dead ends: 454 [2021-05-02 14:55:35,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-02 14:55:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-02 14:55:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2021-05-02 14:55:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 242 states have (on average 1.1322314049586777) internal successors, (274), 244 states have internal predecessors, (274), 169 states have call successors, (169), 41 states have call predecessors, (169), 39 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 14:55:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 609 transitions. [2021-05-02 14:55:35,993 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 609 transitions. Word has length 149 [2021-05-02 14:55:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:35,993 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 609 transitions. [2021-05-02 14:55:35,993 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 14:55:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 609 transitions. [2021-05-02 14:55:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 14:55:35,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:35,994 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 14:55:36,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:36,212 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 8 times [2021-05-02 14:55:36,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:36,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414490903] [2021-05-02 14:55:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:36,220 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:36,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608210463] [2021-05-02 14:55:36,220 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 14:55:36,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:55:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-02 14:55:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:36,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:36,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 137 proven. 127 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-05-02 14:55:37,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:37,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414490903] [2021-05-02 14:55:37,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:37,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608210463] [2021-05-02 14:55:37,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608210463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:37,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:37,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:55:37,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627750898] [2021-05-02 14:55:37,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:55:37,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:37,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:55:37,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:55:37,606 INFO L87 Difference]: Start difference. First operand 451 states and 609 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-02 14:55:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:40,893 INFO L93 Difference]: Finished difference Result 459 states and 616 transitions. [2021-05-02 14:55:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:55:40,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 151 [2021-05-02 14:55:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:40,896 INFO L225 Difference]: With dead ends: 459 [2021-05-02 14:55:40,896 INFO L226 Difference]: Without dead ends: 457 [2021-05-02 14:55:40,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1120.1ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:55:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-05-02 14:55:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 426. [2021-05-02 14:55:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 230 states have (on average 1.1304347826086956) internal successors, (260), 232 states have internal predecessors, (260), 157 states have call successors, (157), 40 states have call predecessors, (157), 38 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2021-05-02 14:55:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 571 transitions. [2021-05-02 14:55:40,942 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 571 transitions. Word has length 151 [2021-05-02 14:55:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:40,943 INFO L480 AbstractCegarLoop]: Abstraction has 426 states and 571 transitions. [2021-05-02 14:55:40,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-02 14:55:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 571 transitions. [2021-05-02 14:55:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 14:55:40,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:40,944 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 14:55:41,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 14:55:41,160 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:41,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 9 times [2021-05-02 14:55:41,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:41,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638814472] [2021-05-02 14:55:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:41,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:41,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044978325] [2021-05-02 14:55:41,168 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 14:55:41,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:55:41,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 14:55:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:41,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:41,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:41,692 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 14:55:41,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:41,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638814472] [2021-05-02 14:55:41,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:41,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044978325] [2021-05-02 14:55:41,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044978325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:41,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:41,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:55:41,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069226565] [2021-05-02 14:55:41,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:55:41,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:41,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:55:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:55:41,693 INFO L87 Difference]: Start difference. First operand 426 states and 571 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 14:55:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:46,320 INFO L93 Difference]: Finished difference Result 469 states and 626 transitions. [2021-05-02 14:55:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:55:46,350 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 14:55:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:46,353 INFO L225 Difference]: With dead ends: 469 [2021-05-02 14:55:46,354 INFO L226 Difference]: Without dead ends: 467 [2021-05-02 14:55:46,355 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:55:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-02 14:55:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 463. [2021-05-02 14:55:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 251 states have (on average 1.1314741035856575) internal successors, (284), 253 states have internal predecessors, (284), 169 states have call successors, (169), 44 states have call predecessors, (169), 42 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 14:55:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 619 transitions. [2021-05-02 14:55:46,427 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 619 transitions. Word has length 154 [2021-05-02 14:55:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:46,428 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 619 transitions. [2021-05-02 14:55:46,428 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 14:55:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 619 transitions. [2021-05-02 14:55:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 14:55:46,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:46,429 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 14:55:46,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:46,640 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:46,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 10 times [2021-05-02 14:55:46,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:46,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359337548] [2021-05-02 14:55:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:46,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:46,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032722489] [2021-05-02 14:55:46,663 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 14:55:46,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:55:46,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 105 conjunts are in the unsatisfiable core [2021-05-02 14:55:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:46,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:52,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:52,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:52,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:54,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:55,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:55,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:08,280 WARN L205 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 14:56:09,152 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 14:56:09,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:09,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:09,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359337548] [2021-05-02 14:56:09,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:09,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032722489] [2021-05-02 14:56:09,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Infinite/NaN value [2021-05-02 14:56:09,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:56:09,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 14:56:09,491 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 14:56:09,492 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:56:09,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 14:56:09,762 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 14:56:09,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:56:09 BoogieIcfgContainer [2021-05-02 14:56:09,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:56:09,764 INFO L168 Benchmark]: Toolchain (without parser) took 208362.30 ms. Allocated memory was 189.8 MB in the beginning and 450.9 MB in the end (delta: 261.1 MB). Free memory was 154.1 MB in the beginning and 409.7 MB in the end (delta: -255.5 MB). Peak memory consumption was 253.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:56:09,764 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 189.8 MB. Free memory is still 170.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:56:09,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.20 ms. Allocated memory is still 189.8 MB. Free memory was 153.9 MB in the beginning and 143.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:56:09,765 INFO L168 Benchmark]: Boogie Preprocessor took 85.46 ms. Allocated memory is still 189.8 MB. Free memory was 143.7 MB in the beginning and 172.9 MB in the end (delta: -29.2 MB). Peak memory consumption was 2.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:56:09,765 INFO L168 Benchmark]: RCFGBuilder took 345.16 ms. Allocated memory is still 189.8 MB. Free memory was 172.9 MB in the beginning and 155.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:56:09,765 INFO L168 Benchmark]: TraceAbstraction took 207636.56 ms. Allocated memory was 189.8 MB in the beginning and 450.9 MB in the end (delta: 261.1 MB). Free memory was 155.1 MB in the beginning and 409.7 MB in the end (delta: -254.6 MB). Peak memory consumption was 255.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:56:09,768 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 189.8 MB. Free memory is still 170.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.20 ms. Allocated memory is still 189.8 MB. Free memory was 153.9 MB in the beginning and 143.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.46 ms. Allocated memory is still 189.8 MB. Free memory was 143.7 MB in the beginning and 172.9 MB in the end (delta: -29.2 MB). Peak memory consumption was 2.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 345.16 ms. Allocated memory is still 189.8 MB. Free memory was 172.9 MB in the beginning and 155.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 207636.56 ms. Allocated memory was 189.8 MB in the beginning and 450.9 MB in the end (delta: 261.1 MB). Free memory was 155.1 MB in the beginning and 409.7 MB in the end (delta: -254.6 MB). Peak memory consumption was 255.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s, c, k, xy, yy; [L21] x = __VERIFIER_nondet_int() [L22] CALL assume_abort_if_not(x>=0 && x<=10) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=10) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=10) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=10) [L25] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(x >= 1) [L26] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L34] c = 0 [L35] k = 0 [L36] xy = (long long) x * y [L37] yy = (long long) y * y [L38] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(xy < 2147483647) [L39] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L39] RET assume_abort_if_not(yy < 2147483647) [L41] COND TRUE 1 [L42] COND FALSE !(!(b != 0)) [L44] c = a [L45] k = 0 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE !(c >= b) [L58] a = b [L59] b = c [L61] long long temp; [L62] temp = p [L63] p = q [L64] q = temp - q * k [L65] temp = r [L66] r = s [L67] s = temp - s * k [L41] COND TRUE 1 [L42] COND FALSE !(!(b != 0)) [L44] c = a [L45] k = 0 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE !(c >= b) [L58] a = b [L59] b = c [L61] long long temp; [L62] temp = p [L63] p = q [L64] q = temp - q * k [L65] temp = r [L66] r = s [L67] s = temp - s * k [L41] COND TRUE 1 [L42] COND FALSE !(!(b != 0)) [L44] c = a [L45] k = 0 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 207567.8ms, OverallIterations: 30, TraceHistogramMax: 20, EmptinessCheckTime: 35.8ms, AutomataDifference: 116525.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1293 SDtfs, 939 SDslu, 8270 SDs, 0 SdLazy, 12061 SolverSat, 998 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 82477.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3033 GetRequests, 2545 SyntacticMatches, 18 SemanticMatches, 470 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 69243.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=463occurred in iteration=29, InterpolantAutomatonStates: 388, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 866.4ms AutomataMinimizationTime, 29 MinimizatonAttempts, 233 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 300.7ms SsaConstructionTime, 1524.6ms SatisfiabilityAnalysisTime, 57937.6ms InterpolantComputationTime, 2924 NumberOfCodeBlocks, 2582 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2895 ConstructedInterpolants, 3 QuantifiedInterpolants, 19489 SizeOfPredicates, 238 NumberOfNonLiveVariables, 7411 ConjunctsInSsa, 1250 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 8663/10129 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...