/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/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:35:49,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:35:49,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:35:49,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 02:35:49,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 02:35:49,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 02:35:49,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 02:35:49,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 02:35:49,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 02:35:49,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 02:35:49,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 02:35:49,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 02:35:49,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:35:49,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:35:49,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:35:49,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:35:49,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:35:49,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:35:49,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:35:49,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:35:49,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:35:49,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:35:49,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:35:49,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:35:49,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 02:35:49,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 02:35:49,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 02:35:49,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 02:35:49,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 02:35:49,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 02:35:49,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 02:35:49,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 02:35:49,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 02:35:49,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 02:35:49,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 02:35:49,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 02:35:49,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 02:35:49,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 02:35:49,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:35:49,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:35:49,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:35:49,401 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 02:35:49,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:35:49,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:35:49,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:35:49,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:35:49,417 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:35:49,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:35:49,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:35:49,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:35:49,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:35:49,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:35:49,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:35:49,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:35:49,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:35:49,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:35:49,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:35:49,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:35:49,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:35:49,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:35:49,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:35:49,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:35:49,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:35:49,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:35:49,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:35:49,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:35:49,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:35:49,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:35:49,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:35:49,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:35:49,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:35:49,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:35:49,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:35:49,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:35:49,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:35:49,733 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:35:49,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2021-05-06 02:35:49,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77b44b9a/ee461a59485e4a7e95deaf11d51a7960/FLAG8919a6e69 [2021-05-06 02:35:50,261 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:35:50,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2021-05-06 02:35:50,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77b44b9a/ee461a59485e4a7e95deaf11d51a7960/FLAG8919a6e69 [2021-05-06 02:35:50,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77b44b9a/ee461a59485e4a7e95deaf11d51a7960 [2021-05-06 02:35:50,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:35:50,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:35:50,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:35:50,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:35:50,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:35:50,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c502a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50, skipping insertion in model container [2021-05-06 02:35:50,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:35:50,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:35:50,630 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/egcd3-ll_unwindbound50.c[490,503] [2021-05-06 02:35:50,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:35:50,650 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:35:50,657 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/egcd3-ll_unwindbound50.c[490,503] [2021-05-06 02:35:50,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:35:50,709 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:35:50,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50 WrapperNode [2021-05-06 02:35:50,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:35:50,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:35:50,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:35:50,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:35:50,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (1/1) ... [2021-05-06 02:35:50,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:35:50,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:35:50,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:35:50,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:35:50,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (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 02:35:50,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:35:50,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:35:50,802 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:35:50,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:35:50,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:35:50,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:35:50,802 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:35:50,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:35:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:35:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:35:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:35:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:35:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:35:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:35:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:35:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:35:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:35:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:35:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:35:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:35:51,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:35:51,011 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 02:35:51,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:35:51 BoogieIcfgContainer [2021-05-06 02:35:51,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:35:51,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:35:51,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:35:51,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:35:51,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:35:50" (1/3) ... [2021-05-06 02:35:51,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551bd16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:35:51, skipping insertion in model container [2021-05-06 02:35:51,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:50" (2/3) ... [2021-05-06 02:35:51,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551bd16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:35:51, skipping insertion in model container [2021-05-06 02:35:51,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:35:51" (3/3) ... [2021-05-06 02:35:51,019 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2021-05-06 02:35:51,023 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:35:51,026 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:35:51,038 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:35:51,065 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:35:51,065 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:35:51,065 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:35:51,065 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:35:51,065 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:35:51,065 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:35:51,065 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:35:51,065 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:35:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:35:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:35:51,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:51,082 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 02:35:51,082 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:51,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-05-06 02:35:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:51,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475703687] [2021-05-06 02:35:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:51,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:35:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:51,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:35:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:51,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:35:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:51,300 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 02:35:51,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:51,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475703687] [2021-05-06 02:35:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475703687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:51,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:51,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:35:51,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274496205] [2021-05-06 02:35:51,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:35:51,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:35:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:35:51,314 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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 02:35:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:51,402 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-06 02:35:51,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:35:51,403 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 02:35:51,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:51,408 INFO L225 Difference]: With dead ends: 74 [2021-05-06 02:35:51,408 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 02:35:51,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:35:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 02:35:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 02:35:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:35:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-06 02:35:51,443 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-06 02:35:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:51,443 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-06 02:35:51,443 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 02:35:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-06 02:35:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:35:51,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:51,444 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 02:35:51,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:35:51,444 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:51,445 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-05-06 02:35:51,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:51,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565979788] [2021-05-06 02:35:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:51,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:51,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654330520] [2021-05-06 02:35:51,457 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 02:35:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:35:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:51,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:51,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:51,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:51,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:51,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:51,642 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 02:35:51,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:51,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565979788] [2021-05-06 02:35:51,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:51,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654330520] [2021-05-06 02:35:51,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654330520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:51,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:51,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:35:51,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837753719] [2021-05-06 02:35:51,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:35:51,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:35:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:35:51,647 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:51,671 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-05-06 02:35:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:35:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:35:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:51,673 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:35:51,673 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 02:35:51,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:35:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 02:35:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 02:35:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:35:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 02:35:51,692 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-06 02:35:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:51,693 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 02:35:51,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 02:35:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 02:35:51,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:51,694 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, 1] [2021-05-06 02:35:51,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:35:51,905 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:51,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2021-05-06 02:35:51,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:51,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779534208] [2021-05-06 02:35:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:51,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:51,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573646460] [2021-05-06 02:35:51,916 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 02:35:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:51,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:35:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:52,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:35:52,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:52,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779534208] [2021-05-06 02:35:52,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:52,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573646460] [2021-05-06 02:35:52,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573646460] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:52,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:52,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:35:52,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313768365] [2021-05-06 02:35:52,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:35:52,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:52,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:35:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:52,066 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:35:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:52,113 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-05-06 02:35:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:35:52,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 02:35:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:52,114 INFO L225 Difference]: With dead ends: 57 [2021-05-06 02:35:52,114 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 02:35:52,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 02:35:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-06 02:35:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:35:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-06 02:35:52,128 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-06 02:35:52,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:52,128 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-06 02:35:52,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:35:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-06 02:35:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:35:52,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:52,130 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, 1] [2021-05-06 02:35:52,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:52,348 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2021-05-06 02:35:52,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:52,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015866501] [2021-05-06 02:35:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:52,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:52,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494597181] [2021-05-06 02:35:52,380 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 02:35:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:35:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:52,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:52,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:52,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015866501] [2021-05-06 02:35:52,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:52,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494597181] [2021-05-06 02:35:52,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494597181] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:52,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:52,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:35:52,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139940043] [2021-05-06 02:35:52,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:35:52,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:35:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:35:52,546 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:52,571 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-05-06 02:35:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:35:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 02:35:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:52,572 INFO L225 Difference]: With dead ends: 62 [2021-05-06 02:35:52,573 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 02:35:52,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:35:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 02:35:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 02:35:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:35:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 02:35:52,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-06 02:35:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:52,577 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 02:35:52,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 02:35:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:35:52,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:52,578 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, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:52,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:52,789 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:52,789 INFO L82 PathProgramCache]: Analyzing trace with hash 795698770, now seen corresponding path program 1 times [2021-05-06 02:35:52,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:52,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134215353] [2021-05-06 02:35:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:52,804 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:52,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533540161] [2021-05-06 02:35:52,804 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 02:35:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:52,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:35:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:52,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:35:52,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134215353] [2021-05-06 02:35:52,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533540161] [2021-05-06 02:35:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533540161] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:52,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:52,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:35:52,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109051578] [2021-05-06 02:35:52,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:52,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:52,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:52,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:52,988 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:35:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:53,078 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-05-06 02:35:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:35:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 02:35:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:53,081 INFO L225 Difference]: With dead ends: 58 [2021-05-06 02:35:53,081 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 02:35:53,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 02:35:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 02:35:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:35:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-06 02:35:53,098 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-06 02:35:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:53,098 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-06 02:35:53,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:35:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-06 02:35:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 02:35:53,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:53,100 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, 1, 1] [2021-05-06 02:35:53,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:53,302 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:53,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:53,303 INFO L82 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2021-05-06 02:35:53,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:53,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530748209] [2021-05-06 02:35:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:53,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:53,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573926711] [2021-05-06 02:35:53,313 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 02:35:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:53,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:35:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:53,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:53,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530748209] [2021-05-06 02:35:53,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573926711] [2021-05-06 02:35:53,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573926711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:53,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:53,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:35:53,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213454653] [2021-05-06 02:35:53,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:35:53,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:35:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:53,443 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:53,474 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-05-06 02:35:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:35:53,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-06 02:35:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:53,476 INFO L225 Difference]: With dead ends: 67 [2021-05-06 02:35:53,476 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 02:35:53,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:35:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 02:35:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 02:35:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:35:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-06 02:35:53,481 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-06 02:35:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:53,482 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-06 02:35:53,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-06 02:35:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 02:35:53,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:53,482 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:53,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:35:53,697 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:53,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:53,697 INFO L82 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2021-05-06 02:35:53,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:53,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050748789] [2021-05-06 02:35:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:53,705 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:53,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270772945] [2021-05-06 02:35:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:35:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:53,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:35:53,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:53,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:35:53,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:53,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050748789] [2021-05-06 02:35:53,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:53,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270772945] [2021-05-06 02:35:53,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270772945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:53,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:53,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:35:53,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338880370] [2021-05-06 02:35:53,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:53,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:53,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:53,825 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 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 02:35:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:53,974 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2021-05-06 02:35:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:35:53,975 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), 3 states have call successors, (5), 2 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 31 [2021-05-06 02:35:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:53,976 INFO L225 Difference]: With dead ends: 138 [2021-05-06 02:35:53,976 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 02:35:53,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:35:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 02:35:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-06 02:35:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:35:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-06 02:35:53,985 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-06 02:35:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:53,985 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-06 02:35:53,986 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), 3 states have call successors, (5), 2 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 02:35:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-06 02:35:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:35:53,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:53,986 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, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:54,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:54,193 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash 495607521, now seen corresponding path program 1 times [2021-05-06 02:35:54,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:54,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073965442] [2021-05-06 02:35:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:54,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:54,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575894721] [2021-05-06 02:35:54,201 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 02:35:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:54,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:35:54,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:54,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,369 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 02:35:54,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:54,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073965442] [2021-05-06 02:35:54,369 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:54,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575894721] [2021-05-06 02:35:54,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575894721] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:54,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:54,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:35:54,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638809869] [2021-05-06 02:35:54,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:54,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:54,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:54,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:54,371 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 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 02:35:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:54,440 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-05-06 02:35:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:35:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 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 34 [2021-05-06 02:35:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:54,441 INFO L225 Difference]: With dead ends: 95 [2021-05-06 02:35:54,441 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 02:35:54,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 02:35:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 02:35:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:35:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-06 02:35:54,462 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-06 02:35:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:54,463 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-06 02:35:54,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 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 02:35:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-06 02:35:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 02:35:54,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:54,468 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:54,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:54,691 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:54,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:54,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2021-05-06 02:35:54,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:54,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269582700] [2021-05-06 02:35:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:54,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:54,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851333431] [2021-05-06 02:35:54,707 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 02:35:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:35:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:54,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:54,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:54,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269582700] [2021-05-06 02:35:54,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:54,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851333431] [2021-05-06 02:35:54,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851333431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:54,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:54,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:35:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911979772] [2021-05-06 02:35:54,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:35:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:35:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:54,837 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:54,864 INFO L93 Difference]: Finished difference Result 135 states and 184 transitions. [2021-05-06 02:35:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:35:54,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-06 02:35:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:54,868 INFO L225 Difference]: With dead ends: 135 [2021-05-06 02:35:54,868 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 02:35:54,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 02:35:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 02:35:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:35:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-06 02:35:54,877 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-06 02:35:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:54,878 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-06 02:35:54,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-06 02:35:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:35:54,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:54,880 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:55,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:35:55,093 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2021-05-06 02:35:55,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:55,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849530782] [2021-05-06 02:35:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:55,105 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:55,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771406258] [2021-05-06 02:35:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:35:55,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:55,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:55,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:55,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849530782] [2021-05-06 02:35:55,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:55,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771406258] [2021-05-06 02:35:55,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771406258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:55,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:55,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:35:55,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504576489] [2021-05-06 02:35:55,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:35:55,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:55,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:35:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:35:55,230 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:55,278 INFO L93 Difference]: Finished difference Result 171 states and 233 transitions. [2021-05-06 02:35:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:35:55,279 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 02:35:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:55,279 INFO L225 Difference]: With dead ends: 171 [2021-05-06 02:35:55,279 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 02:35:55,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 02:35:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-06 02:35:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:35:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-06 02:35:55,286 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-06 02:35:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:55,287 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-06 02:35:55,287 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-06 02:35:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:35:55,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:55,287 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:55,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:55,505 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:55,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2021-05-06 02:35:55,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:55,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803253933] [2021-05-06 02:35:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:55,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:55,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861683742] [2021-05-06 02:35:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:35:55,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:55,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:35:55,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:55,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803253933] [2021-05-06 02:35:55,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:55,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861683742] [2021-05-06 02:35:55,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861683742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:55,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:55,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:35:55,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275930460] [2021-05-06 02:35:55,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:35:55,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:55,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:35:55,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:35:55,690 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 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 02:35:55,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:55,799 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2021-05-06 02:35:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:35:55,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 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 36 [2021-05-06 02:35:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:55,800 INFO L225 Difference]: With dead ends: 154 [2021-05-06 02:35:55,800 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 02:35:55,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:35:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 02:35:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-06 02:35:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 02:35:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-06 02:35:55,808 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-06 02:35:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:55,808 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-06 02:35:55,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 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 02:35:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-06 02:35:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:35:55,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:55,809 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-06 02:35:56,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:56,017 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 2 times [2021-05-06 02:35:56,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:56,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961657998] [2021-05-06 02:35:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:56,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:56,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003666901] [2021-05-06 02:35:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:56,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:35:56,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:35:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:35:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:56,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:56,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:56,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961657998] [2021-05-06 02:35:56,175 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:56,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003666901] [2021-05-06 02:35:56,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003666901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:56,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:56,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:35:56,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507992318] [2021-05-06 02:35:56,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:56,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:56,177 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:56,245 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2021-05-06 02:35:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:35:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-06 02:35:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:56,247 INFO L225 Difference]: With dead ends: 189 [2021-05-06 02:35:56,247 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 02:35:56,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 02:35:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-06 02:35:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 02:35:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-06 02:35:56,261 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-06 02:35:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:56,261 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-06 02:35:56,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-06 02:35:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:35:56,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:56,262 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, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:56,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:35:56,477 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:56,477 INFO L82 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2021-05-06 02:35:56,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:56,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752728779] [2021-05-06 02:35:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:56,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:56,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640536470] [2021-05-06 02:35:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:35:56,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:56,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 02:35:56,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:56,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752728779] [2021-05-06 02:35:56,617 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:56,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640536470] [2021-05-06 02:35:56,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640536470] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:56,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:56,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 02:35:56,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185126262] [2021-05-06 02:35:56,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:35:56,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:56,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:35:56,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:35:56,618 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:35:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:56,719 INFO L93 Difference]: Finished difference Result 195 states and 258 transitions. [2021-05-06 02:35:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:35:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:35:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:56,721 INFO L225 Difference]: With dead ends: 195 [2021-05-06 02:35:56,721 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 02:35:56,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:35:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 02:35:56,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 02:35:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 02:35:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-06 02:35:56,739 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-06 02:35:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:56,739 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-06 02:35:56,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:35:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-06 02:35:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 02:35:56,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:56,740 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:56,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:35:56,957 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2021-05-06 02:35:56,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:56,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281870887] [2021-05-06 02:35:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:56,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:56,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840745725] [2021-05-06 02:35:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:35:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:57,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:57,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:57,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281870887] [2021-05-06 02:35:57,156 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:57,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840745725] [2021-05-06 02:35:57,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840745725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:57,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:57,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:35:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633538871] [2021-05-06 02:35:57,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:35:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:35:57,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:57,158 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:35:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:57,340 INFO L93 Difference]: Finished difference Result 204 states and 263 transitions. [2021-05-06 02:35:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:35:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-05-06 02:35:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:57,342 INFO L225 Difference]: With dead ends: 204 [2021-05-06 02:35:57,342 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 02:35:57,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:35:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 02:35:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-05-06 02:35:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 02:35:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 259 transitions. [2021-05-06 02:35:57,355 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 259 transitions. Word has length 41 [2021-05-06 02:35:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:57,356 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 259 transitions. [2021-05-06 02:35:57,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:35:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 259 transitions. [2021-05-06 02:35:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:35:57,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:57,356 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, 1, 1, 1, 1, 1] [2021-05-06 02:35:57,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:35:57,573 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2021-05-06 02:35:57,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:57,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864693133] [2021-05-06 02:35:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:57,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:57,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635747458] [2021-05-06 02:35:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:35:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:57,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:57,703 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 02:35:57,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:57,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864693133] [2021-05-06 02:35:57,703 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:57,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635747458] [2021-05-06 02:35:57,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635747458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:57,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:57,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:35:57,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385078087] [2021-05-06 02:35:57,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:35:57,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:35:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:35:57,704 INFO L87 Difference]: Start difference. First operand 200 states and 259 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 02:35:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:57,754 INFO L93 Difference]: Finished difference Result 264 states and 362 transitions. [2021-05-06 02:35:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:35:57,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 44 [2021-05-06 02:35:57,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:57,755 INFO L225 Difference]: With dead ends: 264 [2021-05-06 02:35:57,755 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 02:35:57,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 02:35:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-05-06 02:35:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 165 states have internal predecessors, (204), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 02:35:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 316 transitions. [2021-05-06 02:35:57,795 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 316 transitions. Word has length 44 [2021-05-06 02:35:57,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:57,795 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 316 transitions. [2021-05-06 02:35:57,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 02:35:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 316 transitions. [2021-05-06 02:35:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:35:57,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:57,796 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:58,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:58,009 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2021-05-06 02:35:58,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:58,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641350236] [2021-05-06 02:35:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:58,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:58,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433025282] [2021-05-06 02:35:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:35:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:58,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:35:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:58,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:58,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641350236] [2021-05-06 02:35:58,140 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433025282] [2021-05-06 02:35:58,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433025282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:58,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:58,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:35:58,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998095494] [2021-05-06 02:35:58,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:58,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:58,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:58,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:58,141 INFO L87 Difference]: Start difference. First operand 234 states and 316 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:58,208 INFO L93 Difference]: Finished difference Result 387 states and 542 transitions. [2021-05-06 02:35:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:35:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-06 02:35:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:58,209 INFO L225 Difference]: With dead ends: 387 [2021-05-06 02:35:58,209 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 02:35:58,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 02:35:58,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2021-05-06 02:35:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 171 states have internal predecessors, (211), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 02:35:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 323 transitions. [2021-05-06 02:35:58,223 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 323 transitions. Word has length 42 [2021-05-06 02:35:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:58,223 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 323 transitions. [2021-05-06 02:35:58,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 323 transitions. [2021-05-06 02:35:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:35:58,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:58,223 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:58,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:35:58,441 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1912500411, now seen corresponding path program 2 times [2021-05-06 02:35:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:58,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60339325] [2021-05-06 02:35:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:58,446 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:58,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238572946] [2021-05-06 02:35:58,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:58,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:35:58,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:35:58,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:35:58,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:58,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-06 02:35:58,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:58,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60339325] [2021-05-06 02:35:58,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:58,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238572946] [2021-05-06 02:35:58,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238572946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:58,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:58,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:35:58,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882879701] [2021-05-06 02:35:58,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:35:58,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:35:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:35:58,557 INFO L87 Difference]: Start difference. First operand 241 states and 323 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 02:35:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:58,626 INFO L93 Difference]: Finished difference Result 449 states and 662 transitions. [2021-05-06 02:35:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:35:58,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 43 [2021-05-06 02:35:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:58,628 INFO L225 Difference]: With dead ends: 449 [2021-05-06 02:35:58,628 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 02:35:58,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:35:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 02:35:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 265. [2021-05-06 02:35:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 189 states have (on average 1.2962962962962963) internal successors, (245), 195 states have internal predecessors, (245), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 02:35:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2021-05-06 02:35:58,643 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 43 [2021-05-06 02:35:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:58,643 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2021-05-06 02:35:58,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 02:35:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2021-05-06 02:35:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 02:35:58,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:58,644 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:58,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:35:58,852 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:58,852 INFO L82 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2021-05-06 02:35:58,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:58,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687121557] [2021-05-06 02:35:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:58,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:58,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976572475] [2021-05-06 02:35:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:35:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:58,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:58,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 02:35:59,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:59,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687121557] [2021-05-06 02:35:59,050 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:59,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976572475] [2021-05-06 02:35:59,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976572475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:59,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:59,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:35:59,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885427694] [2021-05-06 02:35:59,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:35:59,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:59,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:35:59,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:35:59,051 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:35:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:59,286 INFO L93 Difference]: Finished difference Result 341 states and 479 transitions. [2021-05-06 02:35:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:35:59,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-06 02:35:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:59,288 INFO L225 Difference]: With dead ends: 341 [2021-05-06 02:35:59,288 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 02:35:59,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:35:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 02:35:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 296. [2021-05-06 02:35:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 203 states have (on average 1.3103448275862069) internal successors, (266), 211 states have internal predecessors, (266), 73 states have call successors, (73), 20 states have call predecessors, (73), 19 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:35:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 410 transitions. [2021-05-06 02:35:59,302 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 410 transitions. Word has length 46 [2021-05-06 02:35:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:59,303 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 410 transitions. [2021-05-06 02:35:59,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:35:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 410 transitions. [2021-05-06 02:35:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 02:35:59,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:59,303 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:59,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:35:59,521 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2021-05-06 02:35:59,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:59,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227449816] [2021-05-06 02:35:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:59,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:59,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965760590] [2021-05-06 02:35:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:59,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 02:35:59,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:59,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:35:59,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:59,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227449816] [2021-05-06 02:35:59,817 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:59,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965760590] [2021-05-06 02:35:59,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965760590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:59,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:59,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:35:59,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265923039] [2021-05-06 02:35:59,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:35:59,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:59,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:35:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:35:59,818 INFO L87 Difference]: Start difference. First operand 296 states and 410 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:00,180 INFO L93 Difference]: Finished difference Result 343 states and 480 transitions. [2021-05-06 02:36:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:00,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-05-06 02:36:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:00,182 INFO L225 Difference]: With dead ends: 343 [2021-05-06 02:36:00,182 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 02:36:00,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:36:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 02:36:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-05-06 02:36:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 225 states have (on average 1.3155555555555556) internal successors, (296), 235 states have internal predecessors, (296), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 02:36:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2021-05-06 02:36:00,199 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 58 [2021-05-06 02:36:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:00,200 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2021-05-06 02:36:00,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2021-05-06 02:36:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 02:36:00,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:00,200 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:00,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:00,409 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2021-05-06 02:36:00,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:00,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930116323] [2021-05-06 02:36:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:00,414 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:00,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070297037] [2021-05-06 02:36:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:36:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:00,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:36:00,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:00,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:36:00,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:00,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930116323] [2021-05-06 02:36:00,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:00,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070297037] [2021-05-06 02:36:00,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070297037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:00,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:00,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:36:00,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709797467] [2021-05-06 02:36:00,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:36:00,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:00,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:36:00,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:36:00,611 INFO L87 Difference]: Start difference. First operand 336 states and 472 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:00,710 INFO L93 Difference]: Finished difference Result 531 states and 736 transitions. [2021-05-06 02:36:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-06 02:36:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:00,712 INFO L225 Difference]: With dead ends: 531 [2021-05-06 02:36:00,712 INFO L226 Difference]: Without dead ends: 399 [2021-05-06 02:36:00,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:36:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-06 02:36:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 385. [2021-05-06 02:36:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 261 states have (on average 1.2835249042145593) internal successors, (335), 269 states have internal predecessors, (335), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 02:36:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 519 transitions. [2021-05-06 02:36:00,750 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 519 transitions. Word has length 63 [2021-05-06 02:36:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:00,750 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 519 transitions. [2021-05-06 02:36:00,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 519 transitions. [2021-05-06 02:36:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 02:36:00,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:00,753 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:00,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:00,969 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:00,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 1 times [2021-05-06 02:36:00,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:00,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92687418] [2021-05-06 02:36:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:00,978 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:00,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977275690] [2021-05-06 02:36:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:36:01,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:01,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:36:01,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:01,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92687418] [2021-05-06 02:36:01,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:01,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977275690] [2021-05-06 02:36:01,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977275690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:01,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:01,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:36:01,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297988401] [2021-05-06 02:36:01,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:36:01,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:36:01,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:36:01,143 INFO L87 Difference]: Start difference. First operand 385 states and 519 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:01,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:01,271 INFO L93 Difference]: Finished difference Result 491 states and 644 transitions. [2021-05-06 02:36:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:36:01,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-06 02:36:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:01,273 INFO L225 Difference]: With dead ends: 491 [2021-05-06 02:36:01,273 INFO L226 Difference]: Without dead ends: 484 [2021-05-06 02:36:01,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:36:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-06 02:36:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 462. [2021-05-06 02:36:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 312 states have (on average 1.266025641025641) internal successors, (395), 325 states have internal predecessors, (395), 110 states have call successors, (110), 40 states have call predecessors, (110), 39 states have return successors, (107), 96 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:36:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 612 transitions. [2021-05-06 02:36:01,293 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 612 transitions. Word has length 64 [2021-05-06 02:36:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:01,293 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 612 transitions. [2021-05-06 02:36:01,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 612 transitions. [2021-05-06 02:36:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 02:36:01,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:01,295 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:01,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:36:01,509 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2021-05-06 02:36:01,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:01,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026956149] [2021-05-06 02:36:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:01,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:01,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464237819] [2021-05-06 02:36:01,514 INFO L95 rtionOrderModulation]: Keeping assertion order 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 02:36:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 02:36:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:01,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 02:36:01,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:01,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026956149] [2021-05-06 02:36:01,711 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:01,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464237819] [2021-05-06 02:36:01,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464237819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:01,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:01,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:36:01,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100174645] [2021-05-06 02:36:01,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:36:01,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:36:01,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:36:01,712 INFO L87 Difference]: Start difference. First operand 462 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:36:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:01,870 INFO L93 Difference]: Finished difference Result 506 states and 666 transitions. [2021-05-06 02:36:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:36:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-06 02:36:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:01,872 INFO L225 Difference]: With dead ends: 506 [2021-05-06 02:36:01,872 INFO L226 Difference]: Without dead ends: 504 [2021-05-06 02:36:01,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:36:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-06 02:36:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 480. [2021-05-06 02:36:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 324 states have (on average 1.2592592592592593) internal successors, (408), 337 states have internal predecessors, (408), 113 states have call successors, (113), 43 states have call predecessors, (113), 42 states have return successors, (110), 99 states have call predecessors, (110), 110 states have call successors, (110) [2021-05-06 02:36:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 631 transitions. [2021-05-06 02:36:01,895 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 631 transitions. Word has length 67 [2021-05-06 02:36:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:01,895 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 631 transitions. [2021-05-06 02:36:01,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:36:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 631 transitions. [2021-05-06 02:36:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 02:36:01,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:01,896 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:02,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:36:02,112 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:02,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 2 times [2021-05-06 02:36:02,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:02,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717525531] [2021-05-06 02:36:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:02,117 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:02,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282226424] [2021-05-06 02:36:02,118 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 02:36:02,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:02,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:02,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:36:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:02,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:36:02,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:02,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717525531] [2021-05-06 02:36:02,265 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:02,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282226424] [2021-05-06 02:36:02,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282226424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:02,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:02,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:36:02,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127372453] [2021-05-06 02:36:02,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:36:02,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:02,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:36:02,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:02,266 INFO L87 Difference]: Start difference. First operand 480 states and 631 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:02,595 INFO L93 Difference]: Finished difference Result 823 states and 1202 transitions. [2021-05-06 02:36:02,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:36:02,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-06 02:36:02,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:02,598 INFO L225 Difference]: With dead ends: 823 [2021-05-06 02:36:02,598 INFO L226 Difference]: Without dead ends: 816 [2021-05-06 02:36:02,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:36:02,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-06 02:36:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 542. [2021-05-06 02:36:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.2837837837837838) internal successors, (475), 383 states have internal predecessors, (475), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 02:36:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 730 transitions. [2021-05-06 02:36:02,626 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 730 transitions. Word has length 65 [2021-05-06 02:36:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:02,626 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 730 transitions. [2021-05-06 02:36:02,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 730 transitions. [2021-05-06 02:36:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 02:36:02,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:02,627 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:02,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:02,844 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:02,844 INFO L82 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2021-05-06 02:36:02,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:02,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119236129] [2021-05-06 02:36:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:02,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:02,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977255164] [2021-05-06 02:36:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:36:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:36:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:02,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:36:03,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:03,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119236129] [2021-05-06 02:36:03,000 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:03,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977255164] [2021-05-06 02:36:03,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977255164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:03,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:03,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:36:03,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998623263] [2021-05-06 02:36:03,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:36:03,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:03,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:36:03,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:36:03,001 INFO L87 Difference]: Start difference. First operand 542 states and 730 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:03,099 INFO L93 Difference]: Finished difference Result 799 states and 1112 transitions. [2021-05-06 02:36:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:03,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-06 02:36:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:03,101 INFO L225 Difference]: With dead ends: 799 [2021-05-06 02:36:03,101 INFO L226 Difference]: Without dead ends: 544 [2021-05-06 02:36:03,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:36:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-06 02:36:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 542. [2021-05-06 02:36:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.272972972972973) internal successors, (471), 383 states have internal predecessors, (471), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 02:36:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 726 transitions. [2021-05-06 02:36:03,125 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 726 transitions. Word has length 65 [2021-05-06 02:36:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:03,125 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 726 transitions. [2021-05-06 02:36:03,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 726 transitions. [2021-05-06 02:36:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:36:03,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:03,126 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:03,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 02:36:03,340 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2021-05-06 02:36:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:03,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194947009] [2021-05-06 02:36:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:03,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:03,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98708957] [2021-05-06 02:36:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:03,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 02:36:03,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:03,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-06 02:36:03,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:03,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194947009] [2021-05-06 02:36:03,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:03,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98708957] [2021-05-06 02:36:03,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98708957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:03,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:03,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:36:03,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598835970] [2021-05-06 02:36:03,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:36:03,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:03,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:36:03,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:36:03,482 INFO L87 Difference]: Start difference. First operand 542 states and 726 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:03,568 INFO L93 Difference]: Finished difference Result 927 states and 1283 transitions. [2021-05-06 02:36:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:36:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-06 02:36:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:03,571 INFO L225 Difference]: With dead ends: 927 [2021-05-06 02:36:03,571 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 02:36:03,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:36:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 02:36:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 532. [2021-05-06 02:36:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 376 states have (on average 1.2845744680851063) internal successors, (483), 382 states have internal predecessors, (483), 117 states have call successors, (117), 39 states have call predecessors, (117), 38 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 02:36:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 714 transitions. [2021-05-06 02:36:03,599 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 714 transitions. Word has length 69 [2021-05-06 02:36:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:03,599 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 714 transitions. [2021-05-06 02:36:03,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 714 transitions. [2021-05-06 02:36:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:36:03,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:03,600 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:03,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:03,809 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 2 times [2021-05-06 02:36:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:03,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168844381] [2021-05-06 02:36:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:03,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:03,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673492075] [2021-05-06 02:36:03,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:03,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:36:03,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:03,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:36:03,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:03,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168844381] [2021-05-06 02:36:03,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:03,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673492075] [2021-05-06 02:36:03,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673492075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:03,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:03,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:36:03,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349673620] [2021-05-06 02:36:03,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:36:03,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:03,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:36:03,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:36:03,988 INFO L87 Difference]: Start difference. First operand 532 states and 714 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:04,140 INFO L93 Difference]: Finished difference Result 865 states and 1200 transitions. [2021-05-06 02:36:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:36:04,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-06 02:36:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:04,142 INFO L225 Difference]: With dead ends: 865 [2021-05-06 02:36:04,142 INFO L226 Difference]: Without dead ends: 555 [2021-05-06 02:36:04,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:36:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-05-06 02:36:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2021-05-06 02:36:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 386 states have (on average 1.2772020725388602) internal successors, (493), 389 states have internal predecessors, (493), 118 states have call successors, (118), 40 states have call predecessors, (118), 39 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 02:36:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 726 transitions. [2021-05-06 02:36:04,167 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 726 transitions. Word has length 69 [2021-05-06 02:36:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:04,167 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 726 transitions. [2021-05-06 02:36:04,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 726 transitions. [2021-05-06 02:36:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 02:36:04,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:04,167 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:04,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 02:36:04,381 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 2 times [2021-05-06 02:36:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:04,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525797190] [2021-05-06 02:36:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:04,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:04,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678166221] [2021-05-06 02:36:04,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:04,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:04,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:04,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:36:04,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:36:04,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525797190] [2021-05-06 02:36:04,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678166221] [2021-05-06 02:36:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678166221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:04,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:04,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:36:04,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797685668] [2021-05-06 02:36:04,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:36:04,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:04,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:36:04,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:04,608 INFO L87 Difference]: Start difference. First operand 544 states and 726 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:04,787 INFO L93 Difference]: Finished difference Result 856 states and 1154 transitions. [2021-05-06 02:36:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:36:04,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-06 02:36:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:04,789 INFO L225 Difference]: With dead ends: 856 [2021-05-06 02:36:04,789 INFO L226 Difference]: Without dead ends: 664 [2021-05-06 02:36:04,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-05-06 02:36:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 631. [2021-05-06 02:36:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 444 states have (on average 1.2545045045045045) internal successors, (557), 448 states have internal predecessors, (557), 135 states have call successors, (135), 52 states have call predecessors, (135), 51 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-06 02:36:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 823 transitions. [2021-05-06 02:36:04,818 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 823 transitions. Word has length 70 [2021-05-06 02:36:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:04,820 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 823 transitions. [2021-05-06 02:36:04,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 823 transitions. [2021-05-06 02:36:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 02:36:04,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:04,821 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:05,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:36:05,033 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:05,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2021-05-06 02:36:05,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:05,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370735574] [2021-05-06 02:36:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:05,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:05,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482188103] [2021-05-06 02:36:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:36:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:36:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:05,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 02:36:05,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:05,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370735574] [2021-05-06 02:36:05,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:05,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482188103] [2021-05-06 02:36:05,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482188103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:05,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:05,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:36:05,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064263268] [2021-05-06 02:36:05,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:36:05,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:05,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:36:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:05,193 INFO L87 Difference]: Start difference. First operand 631 states and 823 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:05,317 INFO L93 Difference]: Finished difference Result 724 states and 955 transitions. [2021-05-06 02:36:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:36:05,318 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-05-06 02:36:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:05,320 INFO L225 Difference]: With dead ends: 724 [2021-05-06 02:36:05,320 INFO L226 Difference]: Without dead ends: 722 [2021-05-06 02:36:05,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-05-06 02:36:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 715. [2021-05-06 02:36:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 519 states have (on average 1.2793834296724471) internal successors, (664), 528 states have internal predecessors, (664), 143 states have call successors, (143), 53 states have call predecessors, (143), 52 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 02:36:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 946 transitions. [2021-05-06 02:36:05,375 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 946 transitions. Word has length 70 [2021-05-06 02:36:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:05,375 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 946 transitions. [2021-05-06 02:36:05,375 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 946 transitions. [2021-05-06 02:36:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:36:05,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:05,376 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:05,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:36:05,589 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash -528746969, now seen corresponding path program 1 times [2021-05-06 02:36:05,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:05,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840522838] [2021-05-06 02:36:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:05,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:05,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800098193] [2021-05-06 02:36:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:36:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:05,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:36:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 02:36:05,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840522838] [2021-05-06 02:36:05,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800098193] [2021-05-06 02:36:05,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800098193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:05,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:05,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:36:05,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816451262] [2021-05-06 02:36:05,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:36:05,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:05,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:36:05,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:36:05,806 INFO L87 Difference]: Start difference. First operand 715 states and 946 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:36:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:06,212 INFO L93 Difference]: Finished difference Result 944 states and 1298 transitions. [2021-05-06 02:36:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 02:36:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-06 02:36:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:06,215 INFO L225 Difference]: With dead ends: 944 [2021-05-06 02:36:06,215 INFO L226 Difference]: Without dead ends: 942 [2021-05-06 02:36:06,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:36:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-06 02:36:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 745. [2021-05-06 02:36:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 534 states have (on average 1.2771535580524345) internal successors, (682), 546 states have internal predecessors, (682), 155 states have call successors, (155), 56 states have call predecessors, (155), 55 states have return successors, (151), 142 states have call predecessors, (151), 151 states have call successors, (151) [2021-05-06 02:36:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 988 transitions. [2021-05-06 02:36:06,279 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 988 transitions. Word has length 74 [2021-05-06 02:36:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:06,279 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 988 transitions. [2021-05-06 02:36:06,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:36:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 988 transitions. [2021-05-06 02:36:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 02:36:06,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:06,280 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:06,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:36:06,497 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:06,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2070693174, now seen corresponding path program 2 times [2021-05-06 02:36:06,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:06,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902853366] [2021-05-06 02:36:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:06,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:06,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771307222] [2021-05-06 02:36:06,501 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 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 02:36:06,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:06,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:06,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:36:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:06,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:36:06,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902853366] [2021-05-06 02:36:06,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771307222] [2021-05-06 02:36:06,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771307222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:06,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:06,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:36:06,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221609244] [2021-05-06 02:36:06,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:36:06,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:36:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:06,672 INFO L87 Difference]: Start difference. First operand 745 states and 988 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 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 02:36:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:06,845 INFO L93 Difference]: Finished difference Result 915 states and 1251 transitions. [2021-05-06 02:36:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:06,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 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 73 [2021-05-06 02:36:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:06,848 INFO L225 Difference]: With dead ends: 915 [2021-05-06 02:36:06,848 INFO L226 Difference]: Without dead ends: 913 [2021-05-06 02:36:06,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-05-06 02:36:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 838. [2021-05-06 02:36:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 600 states have (on average 1.3033333333333332) internal successors, (782), 613 states have internal predecessors, (782), 180 states have call successors, (180), 58 states have call predecessors, (180), 57 states have return successors, (176), 166 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-06 02:36:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1138 transitions. [2021-05-06 02:36:06,894 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1138 transitions. Word has length 73 [2021-05-06 02:36:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:06,896 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1138 transitions. [2021-05-06 02:36:06,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 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 02:36:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1138 transitions. [2021-05-06 02:36:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 02:36:06,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:06,896 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:07,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:07,113 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2021-05-06 02:36:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:07,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955512593] [2021-05-06 02:36:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:07,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:07,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383165339] [2021-05-06 02:36:07,118 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 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 02:36:07,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:36:07,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 02:36:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:07,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 02:36:07,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:07,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955512593] [2021-05-06 02:36:07,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:07,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383165339] [2021-05-06 02:36:07,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383165339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:07,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:07,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:36:07,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022090934] [2021-05-06 02:36:07,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:36:07,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:07,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:36:07,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:07,438 INFO L87 Difference]: Start difference. First operand 838 states and 1138 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:36:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:07,866 INFO L93 Difference]: Finished difference Result 922 states and 1255 transitions. [2021-05-06 02:36:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:36:07,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-05-06 02:36:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:07,869 INFO L225 Difference]: With dead ends: 922 [2021-05-06 02:36:07,869 INFO L226 Difference]: Without dead ends: 920 [2021-05-06 02:36:07,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-06 02:36:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 895. [2021-05-06 02:36:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 636 states have (on average 1.309748427672956) internal successors, (833), 650 states have internal predecessors, (833), 198 states have call successors, (198), 61 states have call predecessors, (198), 60 states have return successors, (194), 183 states have call predecessors, (194), 194 states have call successors, (194) [2021-05-06 02:36:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1225 transitions. [2021-05-06 02:36:07,946 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1225 transitions. Word has length 75 [2021-05-06 02:36:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:07,947 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1225 transitions. [2021-05-06 02:36:07,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:36:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1225 transitions. [2021-05-06 02:36:07,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 02:36:07,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:07,948 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:08,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:08,165 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:08,165 INFO L82 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 3 times [2021-05-06 02:36:08,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:08,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782347124] [2021-05-06 02:36:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:08,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:08,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609028658] [2021-05-06 02:36:08,171 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 02:36:08,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:36:08,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:08,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 02:36:08,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:08,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:36:08,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:08,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782347124] [2021-05-06 02:36:08,387 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:08,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609028658] [2021-05-06 02:36:08,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609028658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:08,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:08,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:36:08,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029780856] [2021-05-06 02:36:08,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:36:08,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:36:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:36:08,388 INFO L87 Difference]: Start difference. First operand 895 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:08,603 INFO L93 Difference]: Finished difference Result 1611 states and 2252 transitions. [2021-05-06 02:36:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:36:08,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-06 02:36:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:08,607 INFO L225 Difference]: With dead ends: 1611 [2021-05-06 02:36:08,607 INFO L226 Difference]: Without dead ends: 1075 [2021-05-06 02:36:08,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:36:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-05-06 02:36:08,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1045. [2021-05-06 02:36:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 740 states have (on average 1.2797297297297296) internal successors, (947), 755 states have internal predecessors, (947), 229 states have call successors, (229), 76 states have call predecessors, (229), 75 states have return successors, (224), 213 states have call predecessors, (224), 224 states have call successors, (224) [2021-05-06 02:36:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1400 transitions. [2021-05-06 02:36:08,667 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1400 transitions. Word has length 76 [2021-05-06 02:36:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:08,667 INFO L480 AbstractCegarLoop]: Abstraction has 1045 states and 1400 transitions. [2021-05-06 02:36:08,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1400 transitions. [2021-05-06 02:36:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 02:36:08,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:08,668 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:08,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:08,885 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:08,885 INFO L82 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2021-05-06 02:36:08,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:08,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844199404] [2021-05-06 02:36:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:08,889 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:08,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401934778] [2021-05-06 02:36:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:36:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:08,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 02:36:08,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:09,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 02:36:09,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844199404] [2021-05-06 02:36:09,203 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401934778] [2021-05-06 02:36:09,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401934778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:09,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:09,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:36:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990107568] [2021-05-06 02:36:09,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:36:09,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:36:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:09,204 INFO L87 Difference]: Start difference. First operand 1045 states and 1400 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:36:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:09,735 INFO L93 Difference]: Finished difference Result 1121 states and 1502 transitions. [2021-05-06 02:36:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:36:09,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-05-06 02:36:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:09,739 INFO L225 Difference]: With dead ends: 1121 [2021-05-06 02:36:09,739 INFO L226 Difference]: Without dead ends: 1118 [2021-05-06 02:36:09,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-05-06 02:36:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1053. [2021-05-06 02:36:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2757697456492638) internal successors, (953), 761 states have internal predecessors, (953), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 02:36:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1403 transitions. [2021-05-06 02:36:09,806 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1403 transitions. Word has length 81 [2021-05-06 02:36:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:09,806 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1403 transitions. [2021-05-06 02:36:09,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:36:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1403 transitions. [2021-05-06 02:36:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:36:09,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:09,807 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:10,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 02:36:10,024 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:10,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2021-05-06 02:36:10,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:10,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084102116] [2021-05-06 02:36:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:10,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:10,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453514432] [2021-05-06 02:36:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:36:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:10,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:36:10,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:10,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:10,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084102116] [2021-05-06 02:36:10,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:10,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453514432] [2021-05-06 02:36:10,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453514432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:10,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:10,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:36:10,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482050517] [2021-05-06 02:36:10,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:36:10,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:36:10,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:10,220 INFO L87 Difference]: Start difference. First operand 1053 states and 1403 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:10,398 INFO L93 Difference]: Finished difference Result 1066 states and 1412 transitions. [2021-05-06 02:36:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:36:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-06 02:36:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:10,402 INFO L225 Difference]: With dead ends: 1066 [2021-05-06 02:36:10,402 INFO L226 Difference]: Without dead ends: 1059 [2021-05-06 02:36:10,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-05-06 02:36:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1053. [2021-05-06 02:36:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2730923694779117) internal successors, (951), 761 states have internal predecessors, (951), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 02:36:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1401 transitions. [2021-05-06 02:36:10,457 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1401 transitions. Word has length 87 [2021-05-06 02:36:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:10,457 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1401 transitions. [2021-05-06 02:36:10,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1401 transitions. [2021-05-06 02:36:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:36:10,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:10,458 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 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, 1, 1, 1, 1] [2021-05-06 02:36:10,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:10,673 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash -790944287, now seen corresponding path program 2 times [2021-05-06 02:36:10,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:10,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308785306] [2021-05-06 02:36:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:10,677 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:10,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468407868] [2021-05-06 02:36:10,677 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:10,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:10,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:36:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:10,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:36:10,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:10,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308785306] [2021-05-06 02:36:10,846 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:10,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468407868] [2021-05-06 02:36:10,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468407868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:10,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:10,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:36:10,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360061890] [2021-05-06 02:36:10,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:36:10,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:10,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:36:10,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:36:10,847 INFO L87 Difference]: Start difference. First operand 1053 states and 1401 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:36:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:11,006 INFO L93 Difference]: Finished difference Result 1320 states and 1835 transitions. [2021-05-06 02:36:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:36:11,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-06 02:36:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:11,014 INFO L225 Difference]: With dead ends: 1320 [2021-05-06 02:36:11,014 INFO L226 Difference]: Without dead ends: 1318 [2021-05-06 02:36:11,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:11,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-05-06 02:36:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1198. [2021-05-06 02:36:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 808 states have (on average 1.2896039603960396) internal successors, (1042), 830 states have internal predecessors, (1042), 308 states have call successors, (308), 82 states have call predecessors, (308), 81 states have return successors, (304), 285 states have call predecessors, (304), 304 states have call successors, (304) [2021-05-06 02:36:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1654 transitions. [2021-05-06 02:36:11,089 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1654 transitions. Word has length 90 [2021-05-06 02:36:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:11,089 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 1654 transitions. [2021-05-06 02:36:11,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:36:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1654 transitions. [2021-05-06 02:36:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 02:36:11,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:11,090 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:11,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 02:36:11,307 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:11,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 2 times [2021-05-06 02:36:11,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:11,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238915529] [2021-05-06 02:36:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:11,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:11,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830301678] [2021-05-06 02:36:11,314 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:11,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:11,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 02:36:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:11,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 02:36:11,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:11,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238915529] [2021-05-06 02:36:11,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:11,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830301678] [2021-05-06 02:36:11,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830301678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:11,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:11,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:36:11,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506183828] [2021-05-06 02:36:11,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:36:11,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:36:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:36:11,778 INFO L87 Difference]: Start difference. First operand 1198 states and 1654 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:12,464 INFO L93 Difference]: Finished difference Result 1346 states and 1881 transitions. [2021-05-06 02:36:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:36:12,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-05-06 02:36:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:12,468 INFO L225 Difference]: With dead ends: 1346 [2021-05-06 02:36:12,469 INFO L226 Difference]: Without dead ends: 1343 [2021-05-06 02:36:12,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:36:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-05-06 02:36:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1301. [2021-05-06 02:36:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 862 states have (on average 1.3004640371229699) internal successors, (1121), 888 states have internal predecessors, (1121), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 02:36:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1825 transitions. [2021-05-06 02:36:12,558 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1825 transitions. Word has length 88 [2021-05-06 02:36:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:12,559 INFO L480 AbstractCegarLoop]: Abstraction has 1301 states and 1825 transitions. [2021-05-06 02:36:12,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1825 transitions. [2021-05-06 02:36:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:36:12,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:12,560 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:12,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:12,777 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 2 times [2021-05-06 02:36:12,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:12,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694580890] [2021-05-06 02:36:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:12,782 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:12,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637635898] [2021-05-06 02:36:12,782 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:12,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:12,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 02:36:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:12,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:12,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:12,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694580890] [2021-05-06 02:36:12,981 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:12,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637635898] [2021-05-06 02:36:12,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637635898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:12,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:12,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:36:12,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362631859] [2021-05-06 02:36:12,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:36:12,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:12,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:36:12,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:36:12,982 INFO L87 Difference]: Start difference. First operand 1301 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:13,208 INFO L93 Difference]: Finished difference Result 1338 states and 1861 transitions. [2021-05-06 02:36:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:36:13,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-06 02:36:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:13,212 INFO L225 Difference]: With dead ends: 1338 [2021-05-06 02:36:13,212 INFO L226 Difference]: Without dead ends: 1331 [2021-05-06 02:36:13,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:36:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-05-06 02:36:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1312. [2021-05-06 02:36:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 873 states have (on average 1.2966781214203895) internal successors, (1132), 899 states have internal predecessors, (1132), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 02:36:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1836 transitions. [2021-05-06 02:36:13,298 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1836 transitions. Word has length 91 [2021-05-06 02:36:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:13,298 INFO L480 AbstractCegarLoop]: Abstraction has 1312 states and 1836 transitions. [2021-05-06 02:36:13,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1836 transitions. [2021-05-06 02:36:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 02:36:13,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:13,299 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:13,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 02:36:13,513 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2021-05-06 02:36:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:13,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473848499] [2021-05-06 02:36:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:13,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:13,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54067564] [2021-05-06 02:36:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:13,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 02:36:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:13,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:13,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473848499] [2021-05-06 02:36:13,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54067564] [2021-05-06 02:36:13,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54067564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:13,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:13,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:36:13,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273721199] [2021-05-06 02:36:13,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:36:13,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:36:13,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:36:13,731 INFO L87 Difference]: Start difference. First operand 1312 states and 1836 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:13,996 INFO L93 Difference]: Finished difference Result 1786 states and 2565 transitions. [2021-05-06 02:36:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:36:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-06 02:36:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:14,000 INFO L225 Difference]: With dead ends: 1786 [2021-05-06 02:36:14,001 INFO L226 Difference]: Without dead ends: 1338 [2021-05-06 02:36:14,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:36:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-05-06 02:36:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1332. [2021-05-06 02:36:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 893 states have (on average 1.2889137737961927) internal successors, (1151), 919 states have internal predecessors, (1151), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 02:36:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1855 transitions. [2021-05-06 02:36:14,091 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1855 transitions. Word has length 93 [2021-05-06 02:36:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:14,091 INFO L480 AbstractCegarLoop]: Abstraction has 1332 states and 1855 transitions. [2021-05-06 02:36:14,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1855 transitions. [2021-05-06 02:36:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 02:36:14,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:14,092 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:14,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 02:36:14,307 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 3 times [2021-05-06 02:36:14,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:14,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588155927] [2021-05-06 02:36:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:14,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:14,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410253178] [2021-05-06 02:36:14,312 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:14,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:36:14,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:36:14,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:14,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:14,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:14,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588155927] [2021-05-06 02:36:14,550 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:14,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410253178] [2021-05-06 02:36:14,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410253178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:14,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:14,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:36:14,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850110896] [2021-05-06 02:36:14,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:36:14,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:14,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:36:14,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:14,551 INFO L87 Difference]: Start difference. First operand 1332 states and 1855 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:14,827 INFO L93 Difference]: Finished difference Result 1959 states and 2765 transitions. [2021-05-06 02:36:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 02:36:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-06 02:36:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:14,833 INFO L225 Difference]: With dead ends: 1959 [2021-05-06 02:36:14,833 INFO L226 Difference]: Without dead ends: 1511 [2021-05-06 02:36:14,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-05-06 02:36:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1454. [2021-05-06 02:36:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 963 states have (on average 1.2793354101765317) internal successors, (1232), 990 states have internal predecessors, (1232), 387 states have call successors, (387), 104 states have call predecessors, (387), 103 states have return successors, (382), 359 states have call predecessors, (382), 382 states have call successors, (382) [2021-05-06 02:36:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 2001 transitions. [2021-05-06 02:36:14,935 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 2001 transitions. Word has length 97 [2021-05-06 02:36:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:14,935 INFO L480 AbstractCegarLoop]: Abstraction has 1454 states and 2001 transitions. [2021-05-06 02:36:14,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 2001 transitions. [2021-05-06 02:36:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 02:36:14,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:14,937 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:15,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 02:36:15,149 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 3 times [2021-05-06 02:36:15,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:15,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476225058] [2021-05-06 02:36:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:15,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:15,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034960621] [2021-05-06 02:36:15,153 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:15,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:36:15,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:15,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 02:36:15,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:15,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:15,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476225058] [2021-05-06 02:36:15,394 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034960621] [2021-05-06 02:36:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034960621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:15,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:15,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:36:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506519063] [2021-05-06 02:36:15,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:36:15,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:36:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:36:15,395 INFO L87 Difference]: Start difference. First operand 1454 states and 2001 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:15,743 INFO L93 Difference]: Finished difference Result 1744 states and 2354 transitions. [2021-05-06 02:36:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 02:36:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-05-06 02:36:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:15,749 INFO L225 Difference]: With dead ends: 1744 [2021-05-06 02:36:15,749 INFO L226 Difference]: Without dead ends: 1737 [2021-05-06 02:36:15,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:36:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-05-06 02:36:15,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1654. [2021-05-06 02:36:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1097 states have (on average 1.2652689152233363) internal successors, (1388), 1137 states have internal predecessors, (1388), 434 states have call successors, (434), 123 states have call predecessors, (434), 122 states have return successors, (428), 393 states have call predecessors, (428), 428 states have call successors, (428) [2021-05-06 02:36:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2250 transitions. [2021-05-06 02:36:15,846 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2250 transitions. Word has length 98 [2021-05-06 02:36:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:15,846 INFO L480 AbstractCegarLoop]: Abstraction has 1654 states and 2250 transitions. [2021-05-06 02:36:15,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2250 transitions. [2021-05-06 02:36:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 02:36:15,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:15,847 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:16,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 02:36:16,061 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 1 times [2021-05-06 02:36:16,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:16,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947095710] [2021-05-06 02:36:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:16,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:16,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310820524] [2021-05-06 02:36:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:16,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:36:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:16,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:16,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:16,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947095710] [2021-05-06 02:36:16,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:16,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310820524] [2021-05-06 02:36:16,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310820524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:16,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:16,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:36:16,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346275007] [2021-05-06 02:36:16,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:36:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:36:16,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:16,287 INFO L87 Difference]: Start difference. First operand 1654 states and 2250 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:16,567 INFO L93 Difference]: Finished difference Result 2337 states and 3306 transitions. [2021-05-06 02:36:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 02:36:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-05-06 02:36:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:16,572 INFO L225 Difference]: With dead ends: 2337 [2021-05-06 02:36:16,572 INFO L226 Difference]: Without dead ends: 1656 [2021-05-06 02:36:16,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-05-06 02:36:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1631. [2021-05-06 02:36:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1081 states have (on average 1.247918593894542) internal successors, (1349), 1120 states have internal predecessors, (1349), 428 states have call successors, (428), 122 states have call predecessors, (428), 121 states have return successors, (422), 388 states have call predecessors, (422), 422 states have call successors, (422) [2021-05-06 02:36:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2199 transitions. [2021-05-06 02:36:16,667 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2199 transitions. Word has length 99 [2021-05-06 02:36:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:16,667 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 2199 transitions. [2021-05-06 02:36:16,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2199 transitions. [2021-05-06 02:36:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:36:16,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:16,668 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:16,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:16,884 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:16,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 3 times [2021-05-06 02:36:16,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:16,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090974286] [2021-05-06 02:36:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:16,889 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:16,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766182596] [2021-05-06 02:36:16,889 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:16,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:36:16,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 02:36:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:17,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 70 proven. 7 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-05-06 02:36:17,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:17,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090974286] [2021-05-06 02:36:17,208 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:17,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766182596] [2021-05-06 02:36:17,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766182596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:17,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:17,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:36:17,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660145829] [2021-05-06 02:36:17,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:36:17,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:36:17,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:17,210 INFO L87 Difference]: Start difference. First operand 1631 states and 2199 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:36:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:18,053 INFO L93 Difference]: Finished difference Result 1967 states and 2689 transitions. [2021-05-06 02:36:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:36:18,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2021-05-06 02:36:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:18,072 INFO L225 Difference]: With dead ends: 1967 [2021-05-06 02:36:18,072 INFO L226 Difference]: Without dead ends: 1960 [2021-05-06 02:36:18,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-05-06 02:36:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1872. [2021-05-06 02:36:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1231 states have (on average 1.2518277822908204) internal successors, (1541), 1276 states have internal predecessors, (1541), 507 states have call successors, (507), 134 states have call predecessors, (507), 133 states have return successors, (502), 461 states have call predecessors, (502), 502 states have call successors, (502) [2021-05-06 02:36:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2550 transitions. [2021-05-06 02:36:18,201 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2550 transitions. Word has length 104 [2021-05-06 02:36:18,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:18,201 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 2550 transitions. [2021-05-06 02:36:18,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:36:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2550 transitions. [2021-05-06 02:36:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 02:36:18,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:18,203 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:18,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 02:36:18,417 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 4 times [2021-05-06 02:36:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:18,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240649649] [2021-05-06 02:36:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:18,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:18,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405499826] [2021-05-06 02:36:18,421 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:18,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:36:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:18,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-06 02:36:18,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:18,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:18,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:19,095 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-06 02:36:19,253 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-06 02:36:19,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:19,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:19,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:19,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:19,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 30 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 02:36:19,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:19,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240649649] [2021-05-06 02:36:19,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405499826] [2021-05-06 02:36:19,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405499826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:19,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:19,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 02:36:19,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56003832] [2021-05-06 02:36:19,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 02:36:19,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:19,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 02:36:19,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:36:19,559 INFO L87 Difference]: Start difference. First operand 1872 states and 2550 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-06 02:36:20,567 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-06 02:36:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:21,116 INFO L93 Difference]: Finished difference Result 2057 states and 2814 transitions. [2021-05-06 02:36:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 02:36:21,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 102 [2021-05-06 02:36:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:21,121 INFO L225 Difference]: With dead ends: 2057 [2021-05-06 02:36:21,121 INFO L226 Difference]: Without dead ends: 2055 [2021-05-06 02:36:21,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1375.6ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-06 02:36:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-05-06 02:36:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2031. [2021-05-06 02:36:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1325 states have (on average 1.2588679245283019) internal successors, (1668), 1374 states have internal predecessors, (1668), 561 states have call successors, (561), 145 states have call predecessors, (561), 144 states have return successors, (556), 511 states have call predecessors, (556), 556 states have call successors, (556) [2021-05-06 02:36:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2785 transitions. [2021-05-06 02:36:21,269 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2785 transitions. Word has length 102 [2021-05-06 02:36:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:21,270 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 2785 transitions. [2021-05-06 02:36:21,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-06 02:36:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2785 transitions. [2021-05-06 02:36:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 02:36:21,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:21,272 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:21,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:21,477 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 4 times [2021-05-06 02:36:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:21,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589875966] [2021-05-06 02:36:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:21,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:21,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906743332] [2021-05-06 02:36:21,481 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:21,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:36:21,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:21,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 02:36:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:21,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:21,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:21,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589875966] [2021-05-06 02:36:21,723 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:21,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906743332] [2021-05-06 02:36:21,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906743332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:21,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:21,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:36:21,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189077371] [2021-05-06 02:36:21,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:36:21,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:36:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:36:21,724 INFO L87 Difference]: Start difference. First operand 2031 states and 2785 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:22,107 INFO L93 Difference]: Finished difference Result 3032 states and 4337 transitions. [2021-05-06 02:36:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 02:36:22,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2021-05-06 02:36:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:22,111 INFO L225 Difference]: With dead ends: 3032 [2021-05-06 02:36:22,111 INFO L226 Difference]: Without dead ends: 2143 [2021-05-06 02:36:22,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:36:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-05-06 02:36:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2098. [2021-05-06 02:36:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1388 states have (on average 1.2528818443804035) internal successors, (1739), 1420 states have internal predecessors, (1739), 563 states have call successors, (563), 147 states have call predecessors, (563), 146 states have return successors, (558), 530 states have call predecessors, (558), 558 states have call successors, (558) [2021-05-06 02:36:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2860 transitions. [2021-05-06 02:36:22,273 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2860 transitions. Word has length 103 [2021-05-06 02:36:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:22,274 INFO L480 AbstractCegarLoop]: Abstraction has 2098 states and 2860 transitions. [2021-05-06 02:36:22,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2860 transitions. [2021-05-06 02:36:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:36:22,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:22,275 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:22,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:22,486 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:22,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 4 times [2021-05-06 02:36:22,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:22,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973249386] [2021-05-06 02:36:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:22,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:22,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313055060] [2021-05-06 02:36:22,491 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:22,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:36:22,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:22,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 02:36:22,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:22,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:22,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:22,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973249386] [2021-05-06 02:36:22,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:22,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313055060] [2021-05-06 02:36:22,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313055060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:22,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:22,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:36:22,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89426524] [2021-05-06 02:36:22,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:36:22,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:36:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:36:22,789 INFO L87 Difference]: Start difference. First operand 2098 states and 2860 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:23,241 INFO L93 Difference]: Finished difference Result 3039 states and 4238 transitions. [2021-05-06 02:36:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 02:36:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2021-05-06 02:36:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:23,246 INFO L225 Difference]: With dead ends: 3039 [2021-05-06 02:36:23,246 INFO L226 Difference]: Without dead ends: 2506 [2021-05-06 02:36:23,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:36:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-05-06 02:36:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2373. [2021-05-06 02:36:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 1538 states have (on average 1.2451235370611184) internal successors, (1915), 1571 states have internal predecessors, (1915), 660 states have call successors, (660), 175 states have call predecessors, (660), 174 states have return successors, (654), 626 states have call predecessors, (654), 654 states have call successors, (654) [2021-05-06 02:36:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 3229 transitions. [2021-05-06 02:36:23,424 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 3229 transitions. Word has length 104 [2021-05-06 02:36:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:23,424 INFO L480 AbstractCegarLoop]: Abstraction has 2373 states and 3229 transitions. [2021-05-06 02:36:23,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 3229 transitions. [2021-05-06 02:36:23,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 02:36:23,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:23,434 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:23,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 02:36:23,649 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:23,649 INFO L82 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 4 times [2021-05-06 02:36:23,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:23,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628966238] [2021-05-06 02:36:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:23,653 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:23,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057341847] [2021-05-06 02:36:23,654 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:23,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:36:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:23,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 02:36:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:23,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:23,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:23,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 72 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 02:36:24,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628966238] [2021-05-06 02:36:24,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057341847] [2021-05-06 02:36:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057341847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:24,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:24,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:36:24,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308447697] [2021-05-06 02:36:24,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:36:24,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:24,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:36:24,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:36:24,198 INFO L87 Difference]: Start difference. First operand 2373 states and 3229 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:24,934 INFO L93 Difference]: Finished difference Result 2961 states and 4045 transitions. [2021-05-06 02:36:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:36:24,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 108 [2021-05-06 02:36:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:24,940 INFO L225 Difference]: With dead ends: 2961 [2021-05-06 02:36:24,940 INFO L226 Difference]: Without dead ends: 2356 [2021-05-06 02:36:24,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:36:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-05-06 02:36:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2345. [2021-05-06 02:36:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 1524 states have (on average 1.246719160104987) internal successors, (1900), 1558 states have internal predecessors, (1900), 647 states have call successors, (647), 174 states have call predecessors, (647), 173 states have return successors, (642), 612 states have call predecessors, (642), 642 states have call successors, (642) [2021-05-06 02:36:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3189 transitions. [2021-05-06 02:36:25,100 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3189 transitions. Word has length 108 [2021-05-06 02:36:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:25,100 INFO L480 AbstractCegarLoop]: Abstraction has 2345 states and 3189 transitions. [2021-05-06 02:36:25,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3189 transitions. [2021-05-06 02:36:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:36:25,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:25,101 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:25,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 02:36:25,304 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 5 times [2021-05-06 02:36:25,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:25,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662733057] [2021-05-06 02:36:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:25,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:25,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928053644] [2021-05-06 02:36:25,308 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:25,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:36:25,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:25,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 02:36:25,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:25,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:26,810 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-06 02:36:27,091 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-06 02:36:27,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:27,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 71 proven. 89 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 02:36:28,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:28,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662733057] [2021-05-06 02:36:28,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:28,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928053644] [2021-05-06 02:36:28,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928053644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:28,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:28,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 02:36:28,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560023198] [2021-05-06 02:36:28,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 02:36:28,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 02:36:28,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:36:28,222 INFO L87 Difference]: Start difference. First operand 2345 states and 3189 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:36:31,634 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-06 02:36:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:33,457 INFO L93 Difference]: Finished difference Result 2493 states and 3390 transitions. [2021-05-06 02:36:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:36:33,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 111 [2021-05-06 02:36:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:33,462 INFO L225 Difference]: With dead ends: 2493 [2021-05-06 02:36:33,463 INFO L226 Difference]: Without dead ends: 2490 [2021-05-06 02:36:33,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3714.6ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:36:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-05-06 02:36:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2385. [2021-05-06 02:36:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 1553 states have (on average 1.2421120412105602) internal successors, (1929), 1588 states have internal predecessors, (1929), 649 states have call successors, (649), 183 states have call predecessors, (649), 182 states have return successors, (644), 613 states have call predecessors, (644), 644 states have call successors, (644) [2021-05-06 02:36:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 3222 transitions. [2021-05-06 02:36:33,644 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 3222 transitions. Word has length 111 [2021-05-06 02:36:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:33,644 INFO L480 AbstractCegarLoop]: Abstraction has 2385 states and 3222 transitions. [2021-05-06 02:36:33,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:36:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 3222 transitions. [2021-05-06 02:36:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 02:36:33,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:33,646 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:33,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 02:36:33,853 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 5 times [2021-05-06 02:36:33,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:33,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062947645] [2021-05-06 02:36:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:33,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:33,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668438484] [2021-05-06 02:36:33,859 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:33,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:36:33,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-06 02:36:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:34,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,544 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 02:36:34,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 32 proven. 92 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-05-06 02:36:34,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:34,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062947645] [2021-05-06 02:36:34,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:34,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668438484] [2021-05-06 02:36:34,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668438484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:34,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:34,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:36:34,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363858109] [2021-05-06 02:36:34,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 02:36:34,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:34,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 02:36:34,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:34,729 INFO L87 Difference]: Start difference. First operand 2385 states and 3222 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:36:35,947 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-06 02:36:36,146 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-06 02:36:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:36,539 INFO L93 Difference]: Finished difference Result 2553 states and 3452 transitions. [2021-05-06 02:36:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 02:36:36,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 109 [2021-05-06 02:36:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:36,544 INFO L225 Difference]: With dead ends: 2553 [2021-05-06 02:36:36,544 INFO L226 Difference]: Without dead ends: 2551 [2021-05-06 02:36:36,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1581.5ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-05-06 02:36:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-05-06 02:36:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2494. [2021-05-06 02:36:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1621 states have (on average 1.2449105490438002) internal successors, (2018), 1659 states have internal predecessors, (2018), 683 states have call successors, (683), 190 states have call predecessors, (683), 189 states have return successors, (678), 644 states have call predecessors, (678), 678 states have call successors, (678) [2021-05-06 02:36:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3379 transitions. [2021-05-06 02:36:36,722 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3379 transitions. Word has length 109 [2021-05-06 02:36:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:36,722 INFO L480 AbstractCegarLoop]: Abstraction has 2494 states and 3379 transitions. [2021-05-06 02:36:36,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:36:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3379 transitions. [2021-05-06 02:36:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 02:36:36,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:36,724 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:36,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:36,930 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:36,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 5 times [2021-05-06 02:36:36,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:36,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632454067] [2021-05-06 02:36:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:36,935 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:36,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792339524] [2021-05-06 02:36:36,935 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:37,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:36:37,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:36:37,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:37,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:37,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:37,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632454067] [2021-05-06 02:36:37,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:37,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792339524] [2021-05-06 02:36:37,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792339524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:37,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:37,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:36:37,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41196195] [2021-05-06 02:36:37,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:36:37,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:37,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:36:37,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:37,282 INFO L87 Difference]: Start difference. First operand 2494 states and 3379 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:37,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:37,763 INFO L93 Difference]: Finished difference Result 4028 states and 5681 transitions. [2021-05-06 02:36:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 02:36:37,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2021-05-06 02:36:37,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:37,769 INFO L225 Difference]: With dead ends: 4028 [2021-05-06 02:36:37,769 INFO L226 Difference]: Without dead ends: 3065 [2021-05-06 02:36:37,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:36:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-05-06 02:36:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2949. [2021-05-06 02:36:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 1946 states have (on average 1.2204522096608428) internal successors, (2375), 1984 states have internal predecessors, (2375), 782 states have call successors, (782), 221 states have call predecessors, (782), 220 states have return successors, (776), 743 states have call predecessors, (776), 776 states have call successors, (776) [2021-05-06 02:36:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3933 transitions. [2021-05-06 02:36:38,001 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3933 transitions. Word has length 110 [2021-05-06 02:36:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:38,001 INFO L480 AbstractCegarLoop]: Abstraction has 2949 states and 3933 transitions. [2021-05-06 02:36:38,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:36:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3933 transitions. [2021-05-06 02:36:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 02:36:38,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:38,003 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-05-06 02:36:38,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-06 02:36:38,217 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 6 times [2021-05-06 02:36:38,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:38,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984750447] [2021-05-06 02:36:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:38,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:38,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986476317] [2021-05-06 02:36:38,222 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:38,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-06 02:36:38,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:38,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 02:36:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:38,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 77 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-06 02:36:38,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:38,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984750447] [2021-05-06 02:36:38,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:38,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986476317] [2021-05-06 02:36:38,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986476317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:38,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:38,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:36:38,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954884196] [2021-05-06 02:36:38,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 02:36:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 02:36:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:38,916 INFO L87 Difference]: Start difference. First operand 2949 states and 3933 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:39,783 INFO L93 Difference]: Finished difference Result 3617 states and 4889 transitions. [2021-05-06 02:36:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 02:36:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 115 [2021-05-06 02:36:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:39,790 INFO L225 Difference]: With dead ends: 3617 [2021-05-06 02:36:39,790 INFO L226 Difference]: Without dead ends: 3028 [2021-05-06 02:36:39,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:36:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-05-06 02:36:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3005. [2021-05-06 02:36:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 1977 states have (on average 1.2230652503793626) internal successors, (2418), 2016 states have internal predecessors, (2418), 806 states have call successors, (806), 222 states have call predecessors, (806), 221 states have return successors, (800), 766 states have call predecessors, (800), 800 states have call successors, (800) [2021-05-06 02:36:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 4024 transitions. [2021-05-06 02:36:40,007 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 4024 transitions. Word has length 115 [2021-05-06 02:36:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:40,008 INFO L480 AbstractCegarLoop]: Abstraction has 3005 states and 4024 transitions. [2021-05-06 02:36:40,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 4024 transitions. [2021-05-06 02:36:40,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 02:36:40,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:40,009 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-05-06 02:36:40,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-06 02:36:40,227 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 7 times [2021-05-06 02:36:40,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:40,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888288934] [2021-05-06 02:36:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:40,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:40,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831208632] [2021-05-06 02:36:40,231 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-06 02:36:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 02:36:40,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:40,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888288934] [2021-05-06 02:36:40,765 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:40,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831208632] [2021-05-06 02:36:40,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831208632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:40,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:40,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 02:36:40,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747007395] [2021-05-06 02:36:40,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 02:36:40,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 02:36:40,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:36:40,765 INFO L87 Difference]: Start difference. First operand 3005 states and 4024 transitions. Second operand has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:36:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:41,746 INFO L93 Difference]: Finished difference Result 3146 states and 4214 transitions. [2021-05-06 02:36:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:36:41,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 115 [2021-05-06 02:36:41,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:41,752 INFO L225 Difference]: With dead ends: 3146 [2021-05-06 02:36:41,752 INFO L226 Difference]: Without dead ends: 3143 [2021-05-06 02:36:41,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-05-06 02:36:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2021-05-06 02:36:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 3059. [2021-05-06 02:36:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 2016 states have (on average 1.2197420634920635) internal successors, (2459), 2056 states have internal predecessors, (2459), 812 states have call successors, (812), 231 states have call predecessors, (812), 230 states have return successors, (806), 771 states have call predecessors, (806), 806 states have call successors, (806) [2021-05-06 02:36:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4077 transitions. [2021-05-06 02:36:41,968 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4077 transitions. Word has length 115 [2021-05-06 02:36:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:41,969 INFO L480 AbstractCegarLoop]: Abstraction has 3059 states and 4077 transitions. [2021-05-06 02:36:41,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:36:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4077 transitions. [2021-05-06 02:36:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-06 02:36:41,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:41,970 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:42,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:42,180 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash 564547655, now seen corresponding path program 2 times [2021-05-06 02:36:42,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:42,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971892059] [2021-05-06 02:36:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:42,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:42,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14365306] [2021-05-06 02:36:42,185 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:42,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:42,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:42,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 02:36:42,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:42,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2021-05-06 02:36:42,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:42,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971892059] [2021-05-06 02:36:42,462 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:42,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14365306] [2021-05-06 02:36:42,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14365306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:42,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:42,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:36:42,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279897699] [2021-05-06 02:36:42,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:36:42,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:36:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:36:42,463 INFO L87 Difference]: Start difference. First operand 3059 states and 4077 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 02:36:43,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:43,371 INFO L93 Difference]: Finished difference Result 3573 states and 4898 transitions. [2021-05-06 02:36:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 02:36:43,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 120 [2021-05-06 02:36:43,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:43,376 INFO L225 Difference]: With dead ends: 3573 [2021-05-06 02:36:43,376 INFO L226 Difference]: Without dead ends: 3571 [2021-05-06 02:36:43,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 02:36:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2021-05-06 02:36:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 3100. [2021-05-06 02:36:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 2040 states have (on average 1.219607843137255) internal successors, (2488), 2080 states have internal predecessors, (2488), 824 states have call successors, (824), 236 states have call predecessors, (824), 235 states have return successors, (818), 783 states have call predecessors, (818), 818 states have call successors, (818) [2021-05-06 02:36:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4130 transitions. [2021-05-06 02:36:43,600 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4130 transitions. Word has length 120 [2021-05-06 02:36:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:43,600 INFO L480 AbstractCegarLoop]: Abstraction has 3100 states and 4130 transitions. [2021-05-06 02:36:43,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 02:36:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4130 transitions. [2021-05-06 02:36:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 02:36:43,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:43,602 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-05-06 02:36:43,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-06 02:36:43,802 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:43,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:43,803 INFO L82 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 2 times [2021-05-06 02:36:43,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:43,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693761472] [2021-05-06 02:36:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:43,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:43,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814233082] [2021-05-06 02:36:43,807 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:43,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:43,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 02:36:43,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:43,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 262 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 02:36:44,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693761472] [2021-05-06 02:36:44,076 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814233082] [2021-05-06 02:36:44,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814233082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:44,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:44,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:36:44,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169735197] [2021-05-06 02:36:44,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:36:44,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:44,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:36:44,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:36:44,077 INFO L87 Difference]: Start difference. First operand 3100 states and 4130 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:44,519 INFO L93 Difference]: Finished difference Result 3113 states and 4139 transitions. [2021-05-06 02:36:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 02:36:44,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2021-05-06 02:36:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:44,524 INFO L225 Difference]: With dead ends: 3113 [2021-05-06 02:36:44,524 INFO L226 Difference]: Without dead ends: 3106 [2021-05-06 02:36:44,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:36:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-05-06 02:36:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 3100. [2021-05-06 02:36:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 2040 states have (on average 1.217156862745098) internal successors, (2483), 2080 states have internal predecessors, (2483), 824 states have call successors, (824), 236 states have call predecessors, (824), 235 states have return successors, (818), 783 states have call predecessors, (818), 818 states have call successors, (818) [2021-05-06 02:36:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4125 transitions. [2021-05-06 02:36:44,765 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4125 transitions. Word has length 121 [2021-05-06 02:36:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:44,765 INFO L480 AbstractCegarLoop]: Abstraction has 3100 states and 4125 transitions. [2021-05-06 02:36:44,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4125 transitions. [2021-05-06 02:36:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 02:36:44,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:44,767 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-05-06 02:36:44,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:44,973 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 8 times [2021-05-06 02:36:44,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:44,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909070622] [2021-05-06 02:36:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:44,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:44,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619473423] [2021-05-06 02:36:44,977 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:45,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:45,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 02:36:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:45,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:45,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:45,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:45,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:45,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:45,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-06 02:36:45,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:45,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909070622] [2021-05-06 02:36:45,499 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:45,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619473423] [2021-05-06 02:36:45,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619473423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:45,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:45,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:36:45,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146313781] [2021-05-06 02:36:45,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 02:36:45,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 02:36:45,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:45,500 INFO L87 Difference]: Start difference. First operand 3100 states and 4125 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:46,673 INFO L93 Difference]: Finished difference Result 3262 states and 4358 transitions. [2021-05-06 02:36:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 02:36:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 122 [2021-05-06 02:36:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:46,678 INFO L225 Difference]: With dead ends: 3262 [2021-05-06 02:36:46,678 INFO L226 Difference]: Without dead ends: 3259 [2021-05-06 02:36:46,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-05-06 02:36:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-05-06 02:36:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 3223. [2021-05-06 02:36:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2110 states have (on average 1.2222748815165876) internal successors, (2579), 2154 states have internal predecessors, (2579), 870 states have call successors, (870), 243 states have call predecessors, (870), 242 states have return successors, (864), 825 states have call predecessors, (864), 864 states have call successors, (864) [2021-05-06 02:36:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4313 transitions. [2021-05-06 02:36:46,919 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4313 transitions. Word has length 122 [2021-05-06 02:36:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:46,919 INFO L480 AbstractCegarLoop]: Abstraction has 3223 states and 4313 transitions. [2021-05-06 02:36:46,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4313 transitions. [2021-05-06 02:36:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-06 02:36:46,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:46,921 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:47,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-05-06 02:36:47,124 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:47,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1392518940, now seen corresponding path program 1 times [2021-05-06 02:36:47,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:47,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741823006] [2021-05-06 02:36:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:47,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:47,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293915786] [2021-05-06 02:36:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-06 02:36:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:47,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 96 proven. 124 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 02:36:47,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:47,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741823006] [2021-05-06 02:36:47,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:47,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293915786] [2021-05-06 02:36:47,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293915786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:47,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:47,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:36:47,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583130425] [2021-05-06 02:36:47,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 02:36:47,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:47,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 02:36:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:36:47,743 INFO L87 Difference]: Start difference. First operand 3223 states and 4313 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:36:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:48,738 INFO L93 Difference]: Finished difference Result 3397 states and 4559 transitions. [2021-05-06 02:36:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:36:48,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 125 [2021-05-06 02:36:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:48,743 INFO L225 Difference]: With dead ends: 3397 [2021-05-06 02:36:48,743 INFO L226 Difference]: Without dead ends: 3395 [2021-05-06 02:36:48,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-05-06 02:36:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-05-06 02:36:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3290. [2021-05-06 02:36:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 2150 states have (on average 1.2241860465116279) internal successors, (2632), 2194 states have internal predecessors, (2632), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 02:36:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4406 transitions. [2021-05-06 02:36:48,987 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4406 transitions. Word has length 125 [2021-05-06 02:36:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:48,987 INFO L480 AbstractCegarLoop]: Abstraction has 3290 states and 4406 transitions. [2021-05-06 02:36:48,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:36:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4406 transitions. [2021-05-06 02:36:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-06 02:36:48,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:48,989 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:49,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-06 02:36:49,205 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:49,205 INFO L82 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 4 times [2021-05-06 02:36:49,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:49,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64791837] [2021-05-06 02:36:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:49,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:49,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362418038] [2021-05-06 02:36:49,209 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:49,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:36:49,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:36:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:49,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 279 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 02:36:49,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:49,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64791837] [2021-05-06 02:36:49,525 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:49,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362418038] [2021-05-06 02:36:49,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362418038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:49,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:49,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:36:49,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378020629] [2021-05-06 02:36:49,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:36:49,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:36:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:49,526 INFO L87 Difference]: Start difference. First operand 3290 states and 4406 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:50,057 INFO L93 Difference]: Finished difference Result 3361 states and 4477 transitions. [2021-05-06 02:36:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 02:36:50,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 125 [2021-05-06 02:36:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:50,062 INFO L225 Difference]: With dead ends: 3361 [2021-05-06 02:36:50,062 INFO L226 Difference]: Without dead ends: 3354 [2021-05-06 02:36:50,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:36:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-05-06 02:36:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3299. [2021-05-06 02:36:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 2159 states have (on average 1.22325150532654) internal successors, (2641), 2203 states have internal predecessors, (2641), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 02:36:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 4415 transitions. [2021-05-06 02:36:50,350 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 4415 transitions. Word has length 125 [2021-05-06 02:36:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:50,350 INFO L480 AbstractCegarLoop]: Abstraction has 3299 states and 4415 transitions. [2021-05-06 02:36:50,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 4415 transitions. [2021-05-06 02:36:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 02:36:50,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:50,351 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-05-06 02:36:50,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-06 02:36:50,565 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 2 times [2021-05-06 02:36:50,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:50,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160198252] [2021-05-06 02:36:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:50,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:50,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255035197] [2021-05-06 02:36:50,569 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:50,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:50,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:36:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:50,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 275 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 02:36:50,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:50,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160198252] [2021-05-06 02:36:50,853 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:50,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255035197] [2021-05-06 02:36:50,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255035197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:50,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:50,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:36:50,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129259665] [2021-05-06 02:36:50,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:36:50,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:50,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:36:50,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:50,854 INFO L87 Difference]: Start difference. First operand 3299 states and 4415 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:51,367 INFO L93 Difference]: Finished difference Result 3929 states and 5375 transitions. [2021-05-06 02:36:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 02:36:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 127 [2021-05-06 02:36:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:51,372 INFO L225 Difference]: With dead ends: 3929 [2021-05-06 02:36:51,372 INFO L226 Difference]: Without dead ends: 3374 [2021-05-06 02:36:51,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:36:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2021-05-06 02:36:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3354. [2021-05-06 02:36:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 2214 states have (on average 1.2168021680216803) internal successors, (2694), 2258 states have internal predecessors, (2694), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 02:36:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 4468 transitions. [2021-05-06 02:36:51,612 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 4468 transitions. Word has length 127 [2021-05-06 02:36:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:51,612 INFO L480 AbstractCegarLoop]: Abstraction has 3354 states and 4468 transitions. [2021-05-06 02:36:51,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:36:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 4468 transitions. [2021-05-06 02:36:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 02:36:51,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:51,614 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-05-06 02:36:51,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-06 02:36:51,831 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 9 times [2021-05-06 02:36:51,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:51,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772975791] [2021-05-06 02:36:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:51,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:51,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022898658] [2021-05-06 02:36:51,835 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:51,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 02:36:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-06 02:36:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:52,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,644 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-06 02:36:52,986 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-06 02:36:52,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 119 proven. 45 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-05-06 02:36:53,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:53,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772975791] [2021-05-06 02:36:53,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:53,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022898658] [2021-05-06 02:36:53,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022898658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:53,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:53,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:36:53,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000977256] [2021-05-06 02:36:53,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:36:53,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:36:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:36:53,046 INFO L87 Difference]: Start difference. First operand 3354 states and 4468 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 02:36:55,745 WARN L205 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-05-06 02:37:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:07,103 INFO L93 Difference]: Finished difference Result 3652 states and 4873 transitions. [2021-05-06 02:37:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:37:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 131 [2021-05-06 02:37:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:07,109 INFO L225 Difference]: With dead ends: 3652 [2021-05-06 02:37:07,109 INFO L226 Difference]: Without dead ends: 3629 [2021-05-06 02:37:07,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2157.0ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:37:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-05-06 02:37:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3589. [2021-05-06 02:37:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 2368 states have (on average 1.2204391891891893) internal successors, (2890), 2416 states have internal predecessors, (2890), 959 states have call successors, (959), 262 states have call predecessors, (959), 261 states have return successors, (954), 910 states have call predecessors, (954), 954 states have call successors, (954) [2021-05-06 02:37:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 4803 transitions. [2021-05-06 02:37:07,398 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 4803 transitions. Word has length 131 [2021-05-06 02:37:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:07,398 INFO L480 AbstractCegarLoop]: Abstraction has 3589 states and 4803 transitions. [2021-05-06 02:37:07,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 02:37:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 4803 transitions. [2021-05-06 02:37:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 02:37:07,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:07,400 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:07,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:07,617 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 10 times [2021-05-06 02:37:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:07,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292203246] [2021-05-06 02:37:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:07,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:07,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802351836] [2021-05-06 02:37:07,622 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:07,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:37:07,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:07,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 02:37:07,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:07,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:07,993 WARN L159 QuantifierPusher]: Ignoring assumption.