/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/egcd-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:23:09,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:23:09,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:23:09,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:23:09,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:23:09,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:23:09,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:23:09,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:23:09,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:23:09,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:23:09,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:23:09,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:23:09,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:23:09,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:23:09,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:23:09,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:23:09,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:23:09,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:23:09,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:23:09,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:23:09,315 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:23:09,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:23:09,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:23:09,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:23:09,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:23:09,343 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:23:09,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:23:09,343 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:23:09,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:23:09,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:23:09,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:23:09,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:23:09,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:23:09,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:23:09,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:23:09,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:23:09,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:23:09,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:23:09,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:23:09,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:23:09,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:23:09,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:23:09,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:23:09,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:23:09,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:23:09,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:23:09,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:23:09,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:23:09,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:23:09,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:23:09,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:23:09,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:23:09,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:23:09,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:23:09,721 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:23:09,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound20.c [2021-05-06 02:23:09,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/688737610/74a9dc41939145c688a0710948c8b068/FLAGf050da7af [2021-05-06 02:23:10,222 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:23:10,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound20.c [2021-05-06 02:23:10,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/688737610/74a9dc41939145c688a0710948c8b068/FLAGf050da7af [2021-05-06 02:23:10,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/688737610/74a9dc41939145c688a0710948c8b068 [2021-05-06 02:23:10,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:23:10,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:23:10,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:23:10,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:23:10,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:23:10,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69049737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10, skipping insertion in model container [2021-05-06 02:23:10,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:23:10,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:23:10,690 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/egcd-ll_unwindbound20.c[489,502] [2021-05-06 02:23:10,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:23:10,708 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:23:10,762 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/egcd-ll_unwindbound20.c[489,502] [2021-05-06 02:23:10,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:23:10,796 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:23:10,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10 WrapperNode [2021-05-06 02:23:10,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:23:10,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:23:10,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:23:10,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:23:10,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (1/1) ... [2021-05-06 02:23:10,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:23:10,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:23:10,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:23:10,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:23:10,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:23:10,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:23:10,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:23:10,934 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:23:10,934 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:23:10,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:23:10,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:23:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:23:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:23:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:23:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:23:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:23:11,243 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:23:11,244 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:23:11,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:23:11 BoogieIcfgContainer [2021-05-06 02:23:11,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:23:11,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:23:11,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:23:11,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:23:11,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:23:10" (1/3) ... [2021-05-06 02:23:11,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522c704c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:23:11, skipping insertion in model container [2021-05-06 02:23:11,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:10" (2/3) ... [2021-05-06 02:23:11,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522c704c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:23:11, skipping insertion in model container [2021-05-06 02:23:11,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:23:11" (3/3) ... [2021-05-06 02:23:11,250 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound20.c [2021-05-06 02:23:11,254 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:23:11,260 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:23:11,276 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:23:11,302 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:23:11,302 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:23:11,302 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:23:11,303 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:23:11,303 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:23:11,303 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:23:11,303 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:23:11,303 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:23:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:23:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:23:11,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:11,330 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:11,330 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-06 02:23:11,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:11,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240845080] [2021-05-06 02:23:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:11,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:23:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:11,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:23:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:11,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:23:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:23:11,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:11,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240845080] [2021-05-06 02:23:11,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240845080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:11,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:11,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:23:11,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028730479] [2021-05-06 02:23:11,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:23:11,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:23:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:23:11,555 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:23:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:11,652 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-06 02:23:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:23:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 02:23:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:11,658 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:23:11,658 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:23:11,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:23:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:23:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 02:23:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:23:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 02:23:11,688 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 02:23:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:11,688 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 02:23:11,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:23:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 02:23:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:23:11,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:11,690 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:11,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:23:11,690 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-06 02:23:11,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:11,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978396882] [2021-05-06 02:23:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:11,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:23:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:11,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:23:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:11,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:23:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:23:11,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:11,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978396882] [2021-05-06 02:23:11,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978396882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:11,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:11,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:11,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409267808] [2021-05-06 02:23:11,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:11,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:11,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:11,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:11,781 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:23:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:11,895 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-06 02:23:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:23:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:23:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:11,897 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:23:11,897 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:23:11,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:23:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:23:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:23:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 02:23:11,904 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 02:23:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:11,905 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 02:23:11,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:23:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 02:23:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:23:11,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:11,906 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:11,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 02:23:11,906 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-06 02:23:11,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:11,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205259169] [2021-05-06 02:23:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:11,917 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:11,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518850634] [2021-05-06 02:23:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:23:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:12,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:23:12,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:12,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205259169] [2021-05-06 02:23:12,167 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:12,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518850634] [2021-05-06 02:23:12,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518850634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:12,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:12,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:12,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332213077] [2021-05-06 02:23:12,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:12,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:12,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:12,168 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:23:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:12,205 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-06 02:23:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:23:12,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:23:12,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:12,206 INFO L225 Difference]: With dead ends: 49 [2021-05-06 02:23:12,207 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:23:12,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:23:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 02:23:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:23:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 02:23:12,215 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 02:23:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:12,215 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 02:23:12,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:23:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 02:23:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:23:12,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:12,216 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:12,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 02:23:12,436 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:12,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-06 02:23:12,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:12,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420670831] [2021-05-06 02:23:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:12,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:12,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104919768] [2021-05-06 02:23:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:23:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:12,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:12,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:12,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:12,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:12,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:23:12,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:12,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420670831] [2021-05-06 02:23:12,604 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:12,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104919768] [2021-05-06 02:23:12,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104919768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:12,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:12,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:23:12,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268650546] [2021-05-06 02:23:12,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:23:12,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:12,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:23:12,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:12,605 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:23:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:12,692 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-06 02:23:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:23:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 02:23:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:12,695 INFO L225 Difference]: With dead ends: 71 [2021-05-06 02:23:12,695 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 02:23:12,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 02:23:12,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 02:23:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:23:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 02:23:12,705 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 02:23:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:12,705 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 02:23:12,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:23:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 02:23:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:23:12,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:12,706 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:12,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:12,927 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:12,927 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-06 02:23:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:12,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921124512] [2021-05-06 02:23:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:12,936 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:12,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768365381] [2021-05-06 02:23:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:23:13,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:13,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 02:23:13,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:13,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921124512] [2021-05-06 02:23:13,097 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:13,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768365381] [2021-05-06 02:23:13,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768365381] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:13,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:13,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:13,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117039897] [2021-05-06 02:23:13,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:13,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:13,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:13,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:13,099 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:23:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:13,142 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-06 02:23:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:23:13,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:23:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:13,143 INFO L225 Difference]: With dead ends: 69 [2021-05-06 02:23:13,144 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 02:23:13,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 02:23:13,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 02:23:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:23:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 02:23:13,152 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 02:23:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:13,152 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 02:23:13,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:23:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 02:23:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:23:13,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:13,153 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-06 02:23:13,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:13,370 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-06 02:23:13,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:13,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225720251] [2021-05-06 02:23:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:13,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:13,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030394603] [2021-05-06 02:23:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:23:13,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:13,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:23:13,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225720251] [2021-05-06 02:23:13,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030394603] [2021-05-06 02:23:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030394603] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:13,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:13,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:13,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47057740] [2021-05-06 02:23:13,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:13,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:13,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:13,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:13,583 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:23:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:13,626 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-06 02:23:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:23:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 02:23:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:13,628 INFO L225 Difference]: With dead ends: 77 [2021-05-06 02:23:13,628 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 02:23:13,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 02:23:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 02:23:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:23:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 02:23:13,636 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 02:23:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:13,637 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 02:23:13,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:23:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 02:23:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:23:13,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:13,638 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:13,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:13,864 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:13,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-06 02:23:13,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:13,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573161742] [2021-05-06 02:23:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:13,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:13,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939903742] [2021-05-06 02:23:13,871 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 [2021-05-06 02:23:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:23:13,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:23:13,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:13,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573161742] [2021-05-06 02:23:13,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:13,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939903742] [2021-05-06 02:23:13,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939903742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:13,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:13,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:23:13,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260480579] [2021-05-06 02:23:13,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:13,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:13,996 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:23:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:14,045 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 02:23:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:23:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:23:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:14,047 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:23:14,047 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 02:23:14,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 02:23:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 02:23:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 02:23:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 02:23:14,055 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 02:23:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:14,055 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 02:23:14,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:23:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 02:23:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:23:14,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:14,056 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:14,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 02:23:14,275 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:14,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:14,275 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-06 02:23:14,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:14,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717140833] [2021-05-06 02:23:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:14,281 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:14,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020811949] [2021-05-06 02:23:14,281 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 [2021-05-06 02:23:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:14,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:23:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:14,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:23:14,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:14,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717140833] [2021-05-06 02:23:14,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:14,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020811949] [2021-05-06 02:23:14,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020811949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:14,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:14,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:14,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589853808] [2021-05-06 02:23:14,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:14,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:14,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:14,422 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:23:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:14,458 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-06 02:23:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:23:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-06 02:23:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:14,460 INFO L225 Difference]: With dead ends: 106 [2021-05-06 02:23:14,460 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:23:14,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:23:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 02:23:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 02:23:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 02:23:14,467 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 02:23:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:14,468 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 02:23:14,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:23:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 02:23:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:23:14,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:14,469 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:14,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:14,686 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:14,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-06 02:23:14,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:14,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386241999] [2021-05-06 02:23:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:14,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:14,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457999890] [2021-05-06 02:23:14,699 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 [2021-05-06 02:23:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:23:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:14,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:14,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:14,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:23:14,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:14,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386241999] [2021-05-06 02:23:14,845 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:14,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457999890] [2021-05-06 02:23:14,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457999890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:14,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:14,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:23:14,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529138175] [2021-05-06 02:23:14,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:23:14,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:14,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:23:14,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:14,846 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:23:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:14,963 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-06 02:23:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:23:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 02:23:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:14,966 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:23:14,966 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:23:14,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:23:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:23:14,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 02:23:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 02:23:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 02:23:14,996 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 02:23:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:14,996 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 02:23:14,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:23:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 02:23:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:23:14,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:14,997 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:15,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:15,198 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-06 02:23:15,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:15,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013036755] [2021-05-06 02:23:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:15,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:15,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126203558] [2021-05-06 02:23:15,204 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 [2021-05-06 02:23:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:15,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:23:15,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:15,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 02:23:15,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:15,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013036755] [2021-05-06 02:23:15,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:15,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126203558] [2021-05-06 02:23:15,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126203558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:15,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:15,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:23:15,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574166462] [2021-05-06 02:23:15,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:23:15,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:15,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:23:15,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:23:15,508 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:23:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:15,758 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-06 02:23:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:23:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 02:23:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:15,760 INFO L225 Difference]: With dead ends: 131 [2021-05-06 02:23:15,760 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 02:23:15,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:23:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 02:23:15,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 02:23:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 02:23:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 02:23:15,770 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 02:23:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:15,770 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 02:23:15,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:23:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 02:23:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:23:15,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:15,771 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-05-06 02:23:16,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 02:23:16,013 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-06 02:23:16,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:16,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124952827] [2021-05-06 02:23:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:16,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:16,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924159550] [2021-05-06 02:23:16,019 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 [2021-05-06 02:23:16,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:23:16,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:16,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:23:16,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:16,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 02:23:16,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:16,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124952827] [2021-05-06 02:23:16,317 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:16,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924159550] [2021-05-06 02:23:16,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924159550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:16,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:16,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:23:16,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438362037] [2021-05-06 02:23:16,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:23:16,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:16,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:23:16,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:16,319 INFO L87 Difference]: Start difference. First operand 124 states and 158 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:23:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:16,590 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-06 02:23:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:23:16,591 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 02:23:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:16,594 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:23:16,594 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 02:23:16,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 02:23:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 02:23:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:23:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 02:23:16,631 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 02:23:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:16,632 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 02:23:16,632 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:23:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 02:23:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:23:16,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:16,633 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:16,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:16,845 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:16,845 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-06 02:23:16,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:16,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358535925] [2021-05-06 02:23:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:16,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:16,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188053790] [2021-05-06 02:23:16,851 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:16,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:23:16,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:23:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:16,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:16,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:17,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:17,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:23:17,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:17,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358535925] [2021-05-06 02:23:17,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:17,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188053790] [2021-05-06 02:23:17,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188053790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:17,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:17,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:23:17,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25223770] [2021-05-06 02:23:17,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:23:17,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:17,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:23:17,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:17,019 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:23:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:17,068 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2021-05-06 02:23:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:23:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 02:23:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:17,069 INFO L225 Difference]: With dead ends: 199 [2021-05-06 02:23:17,069 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 02:23:17,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 02:23:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 02:23:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:23:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 02:23:17,079 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 02:23:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:17,079 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 02:23:17,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:23:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 02:23:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:23:17,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:17,080 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:17,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:17,297 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2021-05-06 02:23:17,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:17,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774917140] [2021-05-06 02:23:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:17,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:17,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782309285] [2021-05-06 02:23:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:17,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:23:17,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:17,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:23:17,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:17,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774917140] [2021-05-06 02:23:17,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:17,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782309285] [2021-05-06 02:23:17,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782309285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:17,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:17,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:23:17,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831556523] [2021-05-06 02:23:17,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:23:17,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:17,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:23:17,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:23:17,472 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:23:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:17,560 INFO L93 Difference]: Finished difference Result 188 states and 237 transitions. [2021-05-06 02:23:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:23:17,561 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:23:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:17,562 INFO L225 Difference]: With dead ends: 188 [2021-05-06 02:23:17,562 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 02:23:17,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 02:23:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 02:23:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:23:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 02:23:17,573 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 02:23:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:17,574 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 02:23:17,574 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:23:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 02:23:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:23:17,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:17,574 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:17,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:23:17,792 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash 284565575, now seen corresponding path program 2 times [2021-05-06 02:23:17,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:17,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929803009] [2021-05-06 02:23:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:17,808 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:17,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837278453] [2021-05-06 02:23:17,808 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 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 [2021-05-06 02:23:17,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:23:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:23:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:17,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:23:17,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:17,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929803009] [2021-05-06 02:23:17,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:17,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837278453] [2021-05-06 02:23:17,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837278453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:17,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:17,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:23:17,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127652997] [2021-05-06 02:23:17,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:23:17,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:17,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:23:17,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:23:17,972 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:23:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:18,052 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2021-05-06 02:23:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:23:18,053 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:23:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:18,053 INFO L225 Difference]: With dead ends: 198 [2021-05-06 02:23:18,053 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 02:23:18,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 02:23:18,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 02:23:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:23:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 02:23:18,065 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 02:23:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:18,065 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 02:23:18,065 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:23:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 02:23:18,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:23:18,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:18,065 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:18,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:23:18,282 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 2 times [2021-05-06 02:23:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:18,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521360898] [2021-05-06 02:23:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:18,288 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:18,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702200725] [2021-05-06 02:23:18,288 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 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 [2021-05-06 02:23:18,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:23:18,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:23:18,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:18,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-06 02:23:18,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:18,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521360898] [2021-05-06 02:23:18,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:18,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702200725] [2021-05-06 02:23:18,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702200725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:18,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:18,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:23:18,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408259607] [2021-05-06 02:23:18,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:23:18,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:18,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:23:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:23:18,555 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:23:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:18,774 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2021-05-06 02:23:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:23:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:23:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:18,776 INFO L225 Difference]: With dead ends: 219 [2021-05-06 02:23:18,776 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 02:23:18,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:23:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 02:23:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 02:23:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:23:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 02:23:18,788 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 02:23:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:18,788 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 02:23:18,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:23:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 02:23:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:23:18,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:18,789 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-06 02:23:19,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 02:23:19,006 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2021-05-06 02:23:19,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:19,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381332104] [2021-05-06 02:23:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:19,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:19,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179605290] [2021-05-06 02:23:19,012 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 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 [2021-05-06 02:23:19,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:23:19,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:23:19,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:19,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:23:19,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:19,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381332104] [2021-05-06 02:23:19,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:19,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179605290] [2021-05-06 02:23:19,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179605290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:19,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:19,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:23:19,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064440493] [2021-05-06 02:23:19,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:23:19,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:23:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:19,229 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:23:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:19,368 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2021-05-06 02:23:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:23:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:23:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:19,370 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:23:19,370 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:23:19,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:23:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:23:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 02:23:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:23:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 02:23:19,385 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 02:23:19,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:19,386 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 02:23:19,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:23:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 02:23:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:23:19,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:19,386 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:19,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:19,604 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 4 times [2021-05-06 02:23:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:19,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152987605] [2021-05-06 02:23:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:19,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:19,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596059329] [2021-05-06 02:23:19,611 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 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 [2021-05-06 02:23:19,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:23:19,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:23:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:19,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 43 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 02:23:19,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:19,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152987605] [2021-05-06 02:23:19,853 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:19,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596059329] [2021-05-06 02:23:19,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596059329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:19,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:19,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:23:19,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098981853] [2021-05-06 02:23:19,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:23:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:23:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:19,855 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:23:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:20,110 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2021-05-06 02:23:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:23:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 02:23:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:20,111 INFO L225 Difference]: With dead ends: 242 [2021-05-06 02:23:20,111 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 02:23:20,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:23:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 02:23:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 02:23:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:23:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 02:23:20,121 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 02:23:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:20,122 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 02:23:20,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:23:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 02:23:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:23:20,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:20,122 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:20,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:23:20,339 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:20,339 INFO L82 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2021-05-06 02:23:20,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:20,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361411207] [2021-05-06 02:23:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:20,344 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:20,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13782902] [2021-05-06 02:23:20,345 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 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 [2021-05-06 02:23:20,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:23:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:23:20,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:20,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 02:23:20,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:20,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361411207] [2021-05-06 02:23:20,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:20,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13782902] [2021-05-06 02:23:20,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13782902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:20,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:20,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:23:20,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094528074] [2021-05-06 02:23:20,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:23:20,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:20,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:23:20,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:20,611 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:23:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:20,852 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2021-05-06 02:23:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:23:20,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 02:23:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:20,853 INFO L225 Difference]: With dead ends: 229 [2021-05-06 02:23:20,853 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:23:20,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:23:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:23:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 02:23:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 139 states have internal predecessors, (155), 60 states have call successors, (60), 27 states have call predecessors, (60), 26 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-06 02:23:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 02:23:20,866 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 02:23:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:20,866 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 02:23:20,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:23:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 02:23:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:23:20,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:20,867 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 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] [2021-05-06 02:23:21,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:23:21,081 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 3 times [2021-05-06 02:23:21,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:21,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164604229] [2021-05-06 02:23:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:21,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:21,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557475454] [2021-05-06 02:23:21,088 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 [2021-05-06 02:23:21,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:23:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:23:21,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:21,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:23:21,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:21,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164604229] [2021-05-06 02:23:21,352 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:21,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557475454] [2021-05-06 02:23:21,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557475454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:21,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:21,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:23:21,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866781965] [2021-05-06 02:23:21,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:23:21,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:21,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:23:21,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:23:21,353 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:23:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:21,426 INFO L93 Difference]: Finished difference Result 269 states and 330 transitions. [2021-05-06 02:23:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:23:21,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 02:23:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:21,428 INFO L225 Difference]: With dead ends: 269 [2021-05-06 02:23:21,428 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 02:23:21,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 02:23:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 02:23:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:23:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 02:23:21,441 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 02:23:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:21,441 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 02:23:21,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:23:21,441 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 02:23:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:23:21,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:21,442 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:21,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:21,662 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash -122098436, now seen corresponding path program 5 times [2021-05-06 02:23:21,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:21,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758125054] [2021-05-06 02:23:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:21,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:21,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893052244] [2021-05-06 02:23:21,678 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 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 [2021-05-06 02:23:22,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:23:22,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:23:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:22,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-06 02:23:22,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:22,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758125054] [2021-05-06 02:23:22,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:22,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893052244] [2021-05-06 02:23:22,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893052244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:22,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:22,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:23:22,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648393770] [2021-05-06 02:23:22,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:23:22,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:22,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:23:22,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:22,282 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:23:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:22,354 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2021-05-06 02:23:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:23:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2021-05-06 02:23:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:22,355 INFO L225 Difference]: With dead ends: 266 [2021-05-06 02:23:22,355 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 02:23:22,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:23:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 02:23:22,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 02:23:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 02:23:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 02:23:22,369 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 02:23:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:22,369 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 02:23:22,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:23:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 02:23:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:23:22,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:22,370 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:22,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:22,577 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:22,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1835066184, now seen corresponding path program 6 times [2021-05-06 02:23:22,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:22,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810974062] [2021-05-06 02:23:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:22,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:22,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936784645] [2021-05-06 02:23:22,605 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 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 [2021-05-06 02:23:22,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 02:23:22,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:22,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:23:22,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:22,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:22,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:22,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:22,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:22,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:22,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-06 02:23:22,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:22,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810974062] [2021-05-06 02:23:22,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:22,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936784645] [2021-05-06 02:23:22,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936784645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:22,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:22,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:23:22,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080655584] [2021-05-06 02:23:22,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:23:22,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:23:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:23:22,824 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:23:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:22,896 INFO L93 Difference]: Finished difference Result 256 states and 312 transitions. [2021-05-06 02:23:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:23:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2021-05-06 02:23:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:22,898 INFO L225 Difference]: With dead ends: 256 [2021-05-06 02:23:22,898 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 02:23:22,898 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:23:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 02:23:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 02:23:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 164 states have internal predecessors, (179), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:23:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 02:23:22,911 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 02:23:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:22,912 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 02:23:22,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:23:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 02:23:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:23:22,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:22,913 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:23,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:23,117 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 3 times [2021-05-06 02:23:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:23,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850064511] [2021-05-06 02:23:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:23,122 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:23,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248609338] [2021-05-06 02:23:23,122 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 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 [2021-05-06 02:23:23,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:23:23,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:23,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:23:23,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:23,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:23:23,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:23,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850064511] [2021-05-06 02:23:23,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:23,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248609338] [2021-05-06 02:23:23,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248609338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:23,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:23,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:23:23,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710426089] [2021-05-06 02:23:23,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:23:23,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:23,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:23:23,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:23,401 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-05-06 02:23:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:23,746 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2021-05-06 02:23:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:23:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 85 [2021-05-06 02:23:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:23,748 INFO L225 Difference]: With dead ends: 286 [2021-05-06 02:23:23,748 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 02:23:23,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:23:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 02:23:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 02:23:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 171 states have internal predecessors, (188), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:23:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 02:23:23,763 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 02:23:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:23,763 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 02:23:23,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-05-06 02:23:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 02:23:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:23:23,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:23,764 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:23,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:23:23,977 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2021-05-06 02:23:23,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:23,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438591295] [2021-05-06 02:23:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:23,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:23,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191562928] [2021-05-06 02:23:23,982 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 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 [2021-05-06 02:23:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:24,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 02:23:24,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:24,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:23:24,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:24,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438591295] [2021-05-06 02:23:24,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:24,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191562928] [2021-05-06 02:23:24,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191562928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:24,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:24,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:23:24,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645929327] [2021-05-06 02:23:24,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:23:24,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:24,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:23:24,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:23:24,280 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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) [2021-05-06 02:23:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:24,927 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2021-05-06 02:23:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:23:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 85 [2021-05-06 02:23:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:24,929 INFO L225 Difference]: With dead ends: 308 [2021-05-06 02:23:24,929 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 02:23:24,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:23:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 02:23:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 02:23:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 189 states have (on average 1.164021164021164) internal successors, (220), 198 states have internal predecessors, (220), 74 states have call successors, (74), 38 states have call predecessors, (74), 37 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:23:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 02:23:24,946 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 02:23:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:24,946 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 02:23:24,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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) [2021-05-06 02:23:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 02:23:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:23:24,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:24,947 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:25,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:23:25,166 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 8 times [2021-05-06 02:23:25,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:25,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831991142] [2021-05-06 02:23:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:25,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:25,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895262216] [2021-05-06 02:23:25,172 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 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 [2021-05-06 02:23:25,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:23:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:25,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 02:23:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:25,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:25,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:25,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-06 02:23:25,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:25,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831991142] [2021-05-06 02:23:25,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:25,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895262216] [2021-05-06 02:23:25,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895262216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:25,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:25,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:23:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403892812] [2021-05-06 02:23:25,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:23:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:23:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:25,428 INFO L87 Difference]: Start difference. First operand 301 states and 365 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-05-06 02:23:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:25,841 INFO L93 Difference]: Finished difference Result 330 states and 406 transitions. [2021-05-06 02:23:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:23:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 85 [2021-05-06 02:23:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:25,843 INFO L225 Difference]: With dead ends: 330 [2021-05-06 02:23:25,843 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 02:23:25,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:23:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 02:23:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 02:23:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 185 states have internal predecessors, (206), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 02:23:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 02:23:25,861 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 02:23:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:25,861 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 02:23:25,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-05-06 02:23:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 02:23:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:23:25,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:25,862 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:26,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:26,081 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 9 times [2021-05-06 02:23:26,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:26,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183294548] [2021-05-06 02:23:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:26,115 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:26,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377870482] [2021-05-06 02:23:26,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:26,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:23:26,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 02:23:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:26,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 02:23:26,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:26,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183294548] [2021-05-06 02:23:26,343 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:26,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377870482] [2021-05-06 02:23:26,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377870482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:26,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:26,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:23:26,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123599824] [2021-05-06 02:23:26,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:23:26,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:26,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:23:26,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:26,344 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:23:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:26,803 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2021-05-06 02:23:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:23:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-05-06 02:23:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:26,805 INFO L225 Difference]: With dead ends: 346 [2021-05-06 02:23:26,805 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 02:23:26,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:23:26,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 02:23:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 02:23:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 195 states have internal predecessors, (216), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:23:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 02:23:26,825 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 02:23:26,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:26,825 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 02:23:26,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:23:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 02:23:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:23:26,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:26,826 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:27,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:23:27,045 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 10 times [2021-05-06 02:23:27,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:27,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258303384] [2021-05-06 02:23:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:27,057 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:27,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843568453] [2021-05-06 02:23:27,059 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 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 [2021-05-06 02:23:27,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:23:27,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:27,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:23:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:27,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:23:27,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:27,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258303384] [2021-05-06 02:23:27,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:27,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843568453] [2021-05-06 02:23:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843568453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:27,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:27,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:23:27,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226723974] [2021-05-06 02:23:27,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:23:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:27,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:23:27,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:23:27,339 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:23:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:27,620 INFO L93 Difference]: Finished difference Result 325 states and 409 transitions. [2021-05-06 02:23:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:23:27,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:23:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:27,623 INFO L225 Difference]: With dead ends: 325 [2021-05-06 02:23:27,623 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 02:23:27,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 02:23:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 02:23:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 194 states have (on average 1.175257731958763) internal successors, (228), 204 states have internal predecessors, (228), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (78), 71 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-06 02:23:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 02:23:27,648 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 02:23:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:27,648 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 02:23:27,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:23:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 02:23:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:23:27,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:27,650 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:27,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:27,876 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:27,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 11 times [2021-05-06 02:23:27,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:27,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446579059] [2021-05-06 02:23:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:27,883 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:27,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198294246] [2021-05-06 02:23:27,884 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 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 [2021-05-06 02:23:29,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:23:29,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:23:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:29,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:23:29,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446579059] [2021-05-06 02:23:29,589 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198294246] [2021-05-06 02:23:29,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198294246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:29,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:29,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:23:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382802834] [2021-05-06 02:23:29,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:23:29,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:23:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:23:29,591 INFO L87 Difference]: Start difference. First operand 314 states and 388 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:23:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:30,112 INFO L93 Difference]: Finished difference Result 359 states and 449 transitions. [2021-05-06 02:23:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:23:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:23:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:30,114 INFO L225 Difference]: With dead ends: 359 [2021-05-06 02:23:30,114 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 02:23:30,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 02:23:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 02:23:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 209 states have (on average 1.167464114832536) internal successors, (244), 220 states have internal predecessors, (244), 87 states have call successors, (87), 41 states have call predecessors, (87), 40 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:23:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 02:23:30,161 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 02:23:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:30,161 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 02:23:30,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:23:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 02:23:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:23:30,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:30,178 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:30,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:23:30,379 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 12 times [2021-05-06 02:23:30,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:30,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582679053] [2021-05-06 02:23:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:30,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:30,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239315340] [2021-05-06 02:23:30,384 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 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 [2021-05-06 02:23:30,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:23:30,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:30,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:23:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:30,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:30,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:44,804 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 02:23:44,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:44,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:44,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 02:23:44,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:44,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582679053] [2021-05-06 02:23:44,829 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:44,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239315340] [2021-05-06 02:23:44,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239315340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:44,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:44,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:23:44,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253613778] [2021-05-06 02:23:44,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:23:44,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:44,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:23:44,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:23:44,830 INFO L87 Difference]: Start difference. First operand 337 states and 414 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:24:43,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:43,060 INFO L93 Difference]: Finished difference Result 401 states and 512 transitions. [2021-05-06 02:24:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:24:43,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-05-06 02:24:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:43,063 INFO L225 Difference]: With dead ends: 401 [2021-05-06 02:24:43,063 INFO L226 Difference]: Without dead ends: 383 [2021-05-06 02:24:43,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 14257.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:24:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-06 02:24:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2021-05-06 02:24:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 234 states have (on average 1.1837606837606838) internal successors, (277), 243 states have internal predecessors, (277), 97 states have call successors, (97), 43 states have call predecessors, (97), 42 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:24:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2021-05-06 02:24:43,085 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 90 [2021-05-06 02:24:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:43,085 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2021-05-06 02:24:43,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:24:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2021-05-06 02:24:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 02:24:43,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:43,086 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:43,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:24:43,287 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 4 times [2021-05-06 02:24:43,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:43,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004853851] [2021-05-06 02:24:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:43,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:43,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957994549] [2021-05-06 02:24:43,294 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 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 [2021-05-06 02:24:43,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:24:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:24:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:43,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:24:43,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:43,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004853851] [2021-05-06 02:24:43,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:43,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957994549] [2021-05-06 02:24:43,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957994549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:43,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:43,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:24:43,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618254068] [2021-05-06 02:24:43,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:24:43,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:43,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:24:43,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:24:43,598 INFO L87 Difference]: Start difference. First operand 374 states and 467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:24:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:43,697 INFO L93 Difference]: Finished difference Result 490 states and 592 transitions. [2021-05-06 02:24:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:24:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2021-05-06 02:24:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:43,699 INFO L225 Difference]: With dead ends: 490 [2021-05-06 02:24:43,699 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 02:24:43,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:24:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 02:24:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 02:24:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1392857142857142) internal successors, (319), 290 states have internal predecessors, (319), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (93), 86 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:24:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2021-05-06 02:24:43,724 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 99 [2021-05-06 02:24:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:43,724 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2021-05-06 02:24:43,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:24:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2021-05-06 02:24:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:24:43,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:43,725 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:43,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:24:43,943 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 4 times [2021-05-06 02:24:43,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:43,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540833847] [2021-05-06 02:24:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:43,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:43,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039058867] [2021-05-06 02:24:43,949 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 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 [2021-05-06 02:24:44,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:24:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 02:24:44,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:44,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-06 02:24:44,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:44,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540833847] [2021-05-06 02:24:44,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:44,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039058867] [2021-05-06 02:24:44,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039058867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:44,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:44,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:24:44,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302766008] [2021-05-06 02:24:44,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:24:44,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:44,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:24:44,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:24:44,441 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:24:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:45,260 INFO L93 Difference]: Finished difference Result 469 states and 567 transitions. [2021-05-06 02:24:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:24:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 02:24:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:45,263 INFO L225 Difference]: With dead ends: 469 [2021-05-06 02:24:45,263 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 02:24:45,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:24:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 02:24:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 02:24:45,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 287 states have (on average 1.1428571428571428) internal successors, (328), 297 states have internal predecessors, (328), 100 states have call successors, (100), 56 states have call predecessors, (100), 55 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-06 02:24:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 524 transitions. [2021-05-06 02:24:45,296 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 524 transitions. Word has length 104 [2021-05-06 02:24:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:45,297 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 524 transitions. [2021-05-06 02:24:45,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:24:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 524 transitions. [2021-05-06 02:24:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:24:45,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:45,298 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:45,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:45,515 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:45,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 13 times [2021-05-06 02:24:45,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:45,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996630109] [2021-05-06 02:24:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:45,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:45,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16317417] [2021-05-06 02:24:45,530 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 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 [2021-05-06 02:24:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 02:24:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:45,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 02:24:46,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:46,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996630109] [2021-05-06 02:24:46,006 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:46,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16317417] [2021-05-06 02:24:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16317417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:46,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:46,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:24:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671540950] [2021-05-06 02:24:46,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:24:46,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:24:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:46,007 INFO L87 Difference]: Start difference. First operand 443 states and 524 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:24:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:46,399 INFO L93 Difference]: Finished difference Result 472 states and 565 transitions. [2021-05-06 02:24:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:24:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:24:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:46,401 INFO L225 Difference]: With dead ends: 472 [2021-05-06 02:24:46,401 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 02:24:46,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:24:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 02:24:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 02:24:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.1428571428571428) internal successors, (336), 304 states have internal predecessors, (336), 103 states have call successors, (103), 57 states have call predecessors, (103), 56 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 02:24:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2021-05-06 02:24:46,430 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 104 [2021-05-06 02:24:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:46,430 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2021-05-06 02:24:46,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:24:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2021-05-06 02:24:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:24:46,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:46,431 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:46,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:24:46,649 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 14 times [2021-05-06 02:24:46,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:46,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390154301] [2021-05-06 02:24:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:46,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:46,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798041290] [2021-05-06 02:24:46,656 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:46,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:24:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 02:24:46,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:47,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 02:24:47,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390154301] [2021-05-06 02:24:47,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798041290] [2021-05-06 02:24:47,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798041290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:47,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:47,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:24:47,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87987389] [2021-05-06 02:24:47,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:24:47,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:47,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:24:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:24:47,173 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:24:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:47,875 INFO L93 Difference]: Finished difference Result 497 states and 591 transitions. [2021-05-06 02:24:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:24:47,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:24:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:47,877 INFO L225 Difference]: With dead ends: 497 [2021-05-06 02:24:47,877 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 02:24:47,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:24:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 02:24:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 02:24:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 308 states have internal predecessors, (343), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-06 02:24:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 541 transitions. [2021-05-06 02:24:47,907 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 541 transitions. Word has length 104 [2021-05-06 02:24:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:47,907 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 541 transitions. [2021-05-06 02:24:47,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:24:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 541 transitions. [2021-05-06 02:24:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:24:47,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:47,908 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:48,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:48,127 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 15 times [2021-05-06 02:24:48,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:48,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141228267] [2021-05-06 02:24:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:48,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:48,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303870098] [2021-05-06 02:24:48,136 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:48,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:24:48,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:24:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:48,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:48,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:11,094 WARN L205 SmtUtils]: Spent 15.77 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 02:25:11,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:11,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:12,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 90 proven. 56 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-05-06 02:25:13,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:25:13,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141228267] [2021-05-06 02:25:13,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:25:13,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303870098] [2021-05-06 02:25:13,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303870098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:25:13,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:25:13,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:25:13,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910692961] [2021-05-06 02:25:13,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:25:13,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:25:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:25:13,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:25:13,192 INFO L87 Difference]: Start difference. First operand 460 states and 541 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 02:25:42,851 WARN L205 SmtUtils]: Spent 26.39 s on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-05-06 02:27:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:27:05,433 INFO L93 Difference]: Finished difference Result 569 states and 704 transitions. [2021-05-06 02:27:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:27:05,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 104 [2021-05-06 02:27:05,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:27:05,436 INFO L225 Difference]: With dead ends: 569 [2021-05-06 02:27:05,436 INFO L226 Difference]: Without dead ends: 563 [2021-05-06 02:27:05,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 51749.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:27:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-05-06 02:27:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2021-05-06 02:27:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 331 states have (on average 1.1570996978851964) internal successors, (383), 341 states have internal predecessors, (383), 118 states have call successors, (118), 63 states have call predecessors, (118), 62 states have return successors, (114), 107 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 02:27:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 615 transitions. [2021-05-06 02:27:05,501 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 615 transitions. Word has length 104 [2021-05-06 02:27:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:27:05,501 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 615 transitions. [2021-05-06 02:27:05,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 02:27:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 615 transitions. [2021-05-06 02:27:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:27:05,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:27:05,503 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:27:05,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 02:27:05,704 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:27:05,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:27:05,704 INFO L82 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 16 times [2021-05-06 02:27:05,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:27:05,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479017834] [2021-05-06 02:27:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:27:05,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:27:05,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376865958] [2021-05-06 02:27:05,715 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:27:05,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:27:05,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:27:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:27:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:27:06,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 72 proven. 78 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 02:27:06,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:27:06,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479017834] [2021-05-06 02:27:06,510 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:27:06,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376865958] [2021-05-06 02:27:06,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376865958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:27:06,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:27:06,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:27:06,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702146736] [2021-05-06 02:27:06,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:27:06,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:27:06,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:27:06,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:27:06,512 INFO L87 Difference]: Start difference. First operand 512 states and 615 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:27:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:27:07,860 INFO L93 Difference]: Finished difference Result 541 states and 656 transitions. [2021-05-06 02:27:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:27:07,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 02:27:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:27:07,863 INFO L225 Difference]: With dead ends: 541 [2021-05-06 02:27:07,863 INFO L226 Difference]: Without dead ends: 539 [2021-05-06 02:27:07,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:27:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-06 02:27:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 505. [2021-05-06 02:27:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 326 states have (on average 1.156441717791411) internal successors, (377), 337 states have internal predecessors, (377), 117 states have call successors, (117), 62 states have call predecessors, (117), 61 states have return successors, (113), 105 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-06 02:27:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 607 transitions. [2021-05-06 02:27:07,901 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 607 transitions. Word has length 104 [2021-05-06 02:27:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:27:07,902 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 607 transitions. [2021-05-06 02:27:07,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:27:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 607 transitions. [2021-05-06 02:27:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:27:07,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:27:07,904 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:27:08,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 02:27:08,126 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:27:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:27:08,127 INFO L82 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 17 times [2021-05-06 02:27:08,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:27:08,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789174452] [2021-05-06 02:27:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:27:08,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:27:08,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285433457] [2021-05-06 02:27:08,136 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:27:08,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-06 02:27:08,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:27:08,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:27:08,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:27:08,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:08,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:09,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:10,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:27:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,788 WARN L159 QuantifierPusher]: Ignoring assumption.