/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:52:27,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:52:27,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:52:27,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:52:27,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:52:27,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:52:27,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:52:27,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:52:27,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:52:27,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:52:27,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:52:27,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:52:27,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:52:27,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:52:27,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:52:27,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:52:27,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:52:27,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:52:27,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:52:27,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:52:27,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:52:27,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:52:27,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:52:27,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:52:27,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 08:52:27,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 08:52:27,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 08:52:27,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 08:52:27,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 08:52:27,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 08:52:27,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:52:27,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:52:27,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:52:27,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:52:27,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:52:27,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:52:27,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:52:27,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:52:27,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:52:27,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:52:27,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:52:27,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:52:27,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:52:27,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:52:27,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:52:27,607 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:52:27,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:52:27,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:52:27,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:52:27,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:52:27,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:52:27,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:52:27,608 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:52:27,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:52:27,608 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:52:27,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:52:27,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:52:27,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:52:27,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:52:27,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:52:27,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:52:27,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:52:27,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:52:27,639 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:52:27,640 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:52:27,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:52:27,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:52:27,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:52:27,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:52:27,919 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:52:27,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2021-05-06 08:52:27,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5bbfb61d/eb4c657b644f435a947f8f106639c1d2/FLAG87bd6513f [2021-05-06 08:52:28,333 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:52:28,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2021-05-06 08:52:28,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5bbfb61d/eb4c657b644f435a947f8f106639c1d2/FLAG87bd6513f [2021-05-06 08:52:28,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5bbfb61d/eb4c657b644f435a947f8f106639c1d2 [2021-05-06 08:52:28,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:52:28,359 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:52:28,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:52:28,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:52:28,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:52:28,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccc6556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28, skipping insertion in model container [2021-05-06 08:52:28,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:52:28,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:52:28,540 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/hard-ll_valuebound10.c[546,559] [2021-05-06 08:52:28,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:52:28,559 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:52:28,610 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/hard-ll_valuebound10.c[546,559] [2021-05-06 08:52:28,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:52:28,634 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:52:28,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28 WrapperNode [2021-05-06 08:52:28,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:52:28,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:52:28,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:52:28,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:52:28,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:28,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:52:28,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:52:28,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:52:28,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:52:28,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (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 08:52:28,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:52:28,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:52:28,729 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:52:28,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:52:28,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:52:28,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:52:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:52:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:52:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:52:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:52:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:52:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:52:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:52:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:52:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:52:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:52:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:52:28,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:52:28,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:52:28,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:52:28,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:52:28,977 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:52:28,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:52:28 BoogieIcfgContainer [2021-05-06 08:52:28,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:52:28,979 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:52:28,979 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:52:28,979 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:52:28,998 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:52:28" (1/1) ... [2021-05-06 08:52:29,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:52:29 BasicIcfg [2021-05-06 08:52:29,009 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:52:29,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:52:29,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:52:29,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:52:29,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:52:28" (1/4) ... [2021-05-06 08:52:29,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30533261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:52:29, skipping insertion in model container [2021-05-06 08:52:29,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:52:28" (2/4) ... [2021-05-06 08:52:29,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30533261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:52:29, skipping insertion in model container [2021-05-06 08:52:29,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:52:28" (3/4) ... [2021-05-06 08:52:29,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30533261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:52:29, skipping insertion in model container [2021-05-06 08:52:29,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:52:29" (4/4) ... [2021-05-06 08:52:29,014 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.cJordan [2021-05-06 08:52:29,018 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:52:29,021 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:52:29,031 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:52:29,044 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:52:29,044 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:52:29,044 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:52:29,044 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:52:29,044 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:52:29,044 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:52:29,044 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:52:29,044 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:52:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:52:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:52:29,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:29,058 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:52:29,058 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 08:52:29,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:29,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188174566] [2021-05-06 08:52:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:52:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:52:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:52:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:52:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:52:29,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:29,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188174566] [2021-05-06 08:52:29,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188174566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:52:29,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:52:29,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:52:29,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239563599] [2021-05-06 08:52:29,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:52:29,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:29,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:52:29,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:52:29,233 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 08:52:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:29,375 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:52:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:52:29,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 28 [2021-05-06 08:52:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:29,381 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:52:29,381 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:52:29,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:52:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:52:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:52:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:52:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 08:52:29,434 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 08:52:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:29,435 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 08:52:29,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 08:52:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 08:52:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:52:29,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:29,436 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:52:29,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:52:29,437 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 08:52:29,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:29,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532107198] [2021-05-06 08:52:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:52:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:52:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:52:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:52:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:52:29,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:29,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532107198] [2021-05-06 08:52:29,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532107198] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:52:29,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:52:29,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:52:29,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585093358] [2021-05-06 08:52:29,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:52:29,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:52:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:52:29,568 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:52:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:29,783 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 08:52:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:52:29,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 08:52:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:29,784 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:52:29,784 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:52:29,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:52:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:52:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:52:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:52:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:52:29,791 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 08:52:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:29,791 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:52:29,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:52:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:52:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:52:29,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:29,792 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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 08:52:29,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:52:29,793 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 08:52:29,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:29,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982394220] [2021-05-06 08:52:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:52:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:52:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:52:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:52:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 08:52:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:52:29,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:29,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982394220] [2021-05-06 08:52:29,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982394220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:52:29,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:52:29,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:52:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889875636] [2021-05-06 08:52:29,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:52:29,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:29,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:52:29,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:52:29,890 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:52:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:30,118 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 08:52:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:52:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:52:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:30,121 INFO L225 Difference]: With dead ends: 48 [2021-05-06 08:52:30,121 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 08:52:30,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:52:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 08:52:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 08:52:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:52:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 08:52:30,134 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 08:52:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:30,134 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 08:52:30,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:52:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 08:52:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:52:30,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:30,137 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:52:30,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 08:52:30,137 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:30,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 08:52:30,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:30,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955569200] [2021-05-06 08:52:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:30,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:30,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138078041] [2021-05-06 08:52:30,159 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 08:52:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:52:30,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:52:30,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:52:30,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:30,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955569200] [2021-05-06 08:52:30,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:52:30,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138078041] [2021-05-06 08:52:30,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138078041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:52:30,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:52:30,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:52:30,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072185331] [2021-05-06 08:52:30,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:52:30,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:52:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:52:30,369 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 08:52:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:30,421 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-06 08:52:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:52:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 38 [2021-05-06 08:52:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:30,423 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:52:30,423 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:52:30,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:52:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:52:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 08:52:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:52:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 08:52:30,428 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 08:52:30,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:30,428 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 08:52:30,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 08:52:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 08:52:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:52:30,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:30,430 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:52:30,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:52:30,652 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 08:52:30,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:30,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088885726] [2021-05-06 08:52:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:30,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:30,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035166514] [2021-05-06 08:52:30,664 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 08:52:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:52:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:52:30,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 08:52:30,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:30,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088885726] [2021-05-06 08:52:30,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:52:30,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035166514] [2021-05-06 08:52:30,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035166514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:52:30,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:52:30,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:52:30,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065108571] [2021-05-06 08:52:30,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:52:30,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:52:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:52:30,946 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:52:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:31,052 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-06 08:52:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:52:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 08:52:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:31,053 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:52:31,053 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:52:31,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:52:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:52:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 08:52:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:52:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 08:52:31,056 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 08:52:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:31,056 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 08:52:31,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:52:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 08:52:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:52:31,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:31,058 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 08:52:31,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:52:31,273 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 08:52:31,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:31,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705534742] [2021-05-06 08:52:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:31,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:31,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705871162] [2021-05-06 08:52:31,289 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 08:52:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:52:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:52:31,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 08:52:31,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:31,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705534742] [2021-05-06 08:52:31,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:52:31,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705871162] [2021-05-06 08:52:31,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705871162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:52:31,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:52:31,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:52:31,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592095794] [2021-05-06 08:52:31,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:52:31,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:31,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:52:31,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:52:31,493 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:52:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:31,617 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2021-05-06 08:52:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:52:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 08:52:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:31,619 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:52:31,619 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 08:52:31,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:52:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 08:52:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 08:52:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:52:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 08:52:31,623 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 08:52:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:31,623 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 08:52:31,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:52:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 08:52:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 08:52:31,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:31,624 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 08:52:31,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:52:31,838 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:31,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-06 08:52:31,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:31,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768941244] [2021-05-06 08:52:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:31,844 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:31,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685869368] [2021-05-06 08:52:31,844 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 08:52:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:31,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:52:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:52:31,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:31,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:52:32,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768941244] [2021-05-06 08:52:32,136 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:52:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685869368] [2021-05-06 08:52:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685869368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:52:32,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:52:32,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:52:32,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999057374] [2021-05-06 08:52:32,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:52:32,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:52:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:52:32,138 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 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 08:52:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:32,294 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-05-06 08:52:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:52:32,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 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 62 [2021-05-06 08:52:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:32,297 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:52:32,297 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 08:52:32,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:52:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 08:52:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 08:52:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:52:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 08:52:32,308 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 08:52:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:32,308 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 08:52:32,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 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 08:52:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 08:52:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:52:32,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:32,309 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:52:32,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:52:32,510 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:32,510 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-06 08:52:32,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:32,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740877263] [2021-05-06 08:52:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:32,516 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:32,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995068705] [2021-05-06 08:52:32,517 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 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 08:52:32,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:52:32,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:52:32,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:52:32,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:52:32,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 08:52:32,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:32,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740877263] [2021-05-06 08:52:32,752 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:52:32,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995068705] [2021-05-06 08:52:32,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995068705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:52:32,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:52:32,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:52:32,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054583121] [2021-05-06 08:52:32,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:52:32,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:32,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:52:32,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:52:32,754 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:52:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:32,943 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2021-05-06 08:52:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:52:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2021-05-06 08:52:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:32,946 INFO L225 Difference]: With dead ends: 114 [2021-05-06 08:52:32,946 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 08:52:32,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:52:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 08:52:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-05-06 08:52:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.123076923076923) internal successors, (73), 68 states have internal predecessors, (73), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:52:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-05-06 08:52:32,962 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 72 [2021-05-06 08:52:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:32,962 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-05-06 08:52:32,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:52:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-05-06 08:52:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:52:32,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:32,964 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1] [2021-05-06 08:52:33,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:52:33,181 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-06 08:52:33,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:33,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094092704] [2021-05-06 08:52:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:33,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:33,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639871385] [2021-05-06 08:52:33,187 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 08:52:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:33,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:52:33,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:52:33,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 08:52:33,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:33,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094092704] [2021-05-06 08:52:33,662 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:52:33,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639871385] [2021-05-06 08:52:33,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639871385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:52:33,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:52:33,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:52:33,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498331012] [2021-05-06 08:52:33,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:52:33,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:33,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:52:33,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:52:33,664 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:52:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:33,907 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2021-05-06 08:52:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:52:33,908 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 08:52:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:33,909 INFO L225 Difference]: With dead ends: 121 [2021-05-06 08:52:33,909 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 08:52:33,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:52:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 08:52:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-06 08:52:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 74 states have internal predecessors, (79), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:52:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-05-06 08:52:33,914 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 75 [2021-05-06 08:52:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:33,914 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-05-06 08:52:33,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:52:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-05-06 08:52:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:52:33,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:33,915 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:52:34,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:52:34,135 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:34,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864424, now seen corresponding path program 2 times [2021-05-06 08:52:34,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:34,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992693752] [2021-05-06 08:52:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:34,142 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:34,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775183993] [2021-05-06 08:52:34,143 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 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 08:52:34,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:52:34,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:52:34,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:52:34,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:52:34,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-06 08:52:34,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:34,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992693752] [2021-05-06 08:52:34,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:52:34,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775183993] [2021-05-06 08:52:34,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775183993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:52:34,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:52:34,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:52:34,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014622590] [2021-05-06 08:52:34,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:52:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:52:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:52:34,971 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:52:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:35,469 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2021-05-06 08:52:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:52:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-06 08:52:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:35,474 INFO L225 Difference]: With dead ends: 141 [2021-05-06 08:52:35,474 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:52:35,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:52:35,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:52:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-06 08:52:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:52:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-05-06 08:52:35,484 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 79 [2021-05-06 08:52:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:35,484 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-05-06 08:52:35,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:52:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-05-06 08:52:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:52:35,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:35,489 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:52:35,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:52:35,705 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-06 08:52:35,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:35,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136484620] [2021-05-06 08:52:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:35,725 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:35,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440715229] [2021-05-06 08:52:35,725 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 08:52:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:52:35,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:52:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:52:36,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:52:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 08:52:36,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:52:36,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136484620] [2021-05-06 08:52:36,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:52:36,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440715229] [2021-05-06 08:52:36,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440715229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:52:36,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:52:36,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:52:36,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199708860] [2021-05-06 08:52:36,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:52:36,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:52:36,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:52:36,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:52:36,146 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:52:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:52:36,278 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-05-06 08:52:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:52:36,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2021-05-06 08:52:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:52:36,279 INFO L225 Difference]: With dead ends: 158 [2021-05-06 08:52:36,279 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 08:52:36,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:52:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 08:52:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-05-06 08:52:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:52:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-05-06 08:52:36,299 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 86 [2021-05-06 08:52:36,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:52:36,299 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-05-06 08:52:36,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:52:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-05-06 08:52:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:52:36,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:52:36,300 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:52:36,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:52:36,501 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:52:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:52:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138899, now seen corresponding path program 3 times [2021-05-06 08:52:36,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:52:36,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737880026] [2021-05-06 08:52:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:52:36,508 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:52:36,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825068751] [2021-05-06 08:52:36,508 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 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 08:52:36,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:52:36,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:52:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:52:36,572 INFO L286 TraceCheckSpWp]: Computing forward predicates...