/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/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:25:50,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:25:50,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:25:50,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:25:50,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:25:50,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:25:50,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:25:50,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:25:50,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:25:50,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:25:50,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:25:50,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:25:50,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:25:50,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:25:50,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:25:50,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:25:50,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:25:50,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:25:50,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:25:50,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:25:50,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:25:50,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:25:50,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:25:50,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:25:50,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 08:25:50,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 08:25:50,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 08:25:50,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 08:25:50,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 08:25:50,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 08:25:50,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:25:50,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:25:50,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:25:50,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:25:50,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:25:50,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:25:50,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:25:50,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:25:50,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:25:50,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:25:50,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:25:50,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:25:50,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:25:50,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:25:50,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:25:50,378 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:25:50,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:25:50,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:25:50,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:25:50,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:25:50,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:25:50,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:25:50,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:25:50,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:25:50,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:25:50,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:25:50,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:25:50,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:25:50,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:25:50,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:25:50,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:25:50,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:25:50,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:25:50,388 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:25:50,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:25:50,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:25:50,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:25:50,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:25:50,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:25:50,827 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:25:50,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2021-05-06 08:25:50,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f458521e1/e98796051e98468c986d0d21141a323f/FLAG37c3644d5 [2021-05-06 08:25:51,405 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:25:51,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2021-05-06 08:25:51,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f458521e1/e98796051e98468c986d0d21141a323f/FLAG37c3644d5 [2021-05-06 08:25:51,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f458521e1/e98796051e98468c986d0d21141a323f [2021-05-06 08:25:51,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:25:51,769 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:25:51,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:25:51,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:25:51,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:25:51,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:51,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bff05c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51, skipping insertion in model container [2021-05-06 08:25:51,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:51,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:25:51,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:25:51,901 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/fermat2-ll_unwindbound100.c[524,537] [2021-05-06 08:25:51,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:25:51,921 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:25:51,971 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/fermat2-ll_unwindbound100.c[524,537] [2021-05-06 08:25:51,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:25:51,984 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:25:51,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51 WrapperNode [2021-05-06 08:25:51,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:25:51,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:25:51,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:25:51,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:25:51,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:51,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:51,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:51,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:52,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:52,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:52,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (1/1) ... [2021-05-06 08:25:52,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:25:52,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:25:52,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:25:52,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:25:52,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (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 08:25:52,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:25:52,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:25:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:25:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:25:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:25:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:25:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:25:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:25:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:25:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:25:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:25:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:25:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:25:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:25:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:25:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:25:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:25:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:25:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:25:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:25:52,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:25:52,320 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:25:52,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:25:52 BoogieIcfgContainer [2021-05-06 08:25:52,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:25:52,322 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:25:52,322 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:25:52,322 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:25:52,324 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:25:52" (1/1) ... [2021-05-06 08:25:52,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:25:52 BasicIcfg [2021-05-06 08:25:52,350 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:25:52,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:25:52,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:25:52,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:25:52,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:25:51" (1/4) ... [2021-05-06 08:25:52,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6840d0c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:25:52, skipping insertion in model container [2021-05-06 08:25:52,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:51" (2/4) ... [2021-05-06 08:25:52,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6840d0c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:25:52, skipping insertion in model container [2021-05-06 08:25:52,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:25:52" (3/4) ... [2021-05-06 08:25:52,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6840d0c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:25:52, skipping insertion in model container [2021-05-06 08:25:52,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:25:52" (4/4) ... [2021-05-06 08:25:52,355 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.cJordan [2021-05-06 08:25:52,359 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:25:52,365 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:25:52,376 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:25:52,400 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:25:52,400 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:25:52,400 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:25:52,400 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:25:52,400 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:25:52,400 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:25:52,400 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:25:52,400 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:25:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:25:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:25:52,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:52,417 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:52,417 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:52,422 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-06 08:25:52,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:52,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488498209] [2021-05-06 08:25:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:52,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:52,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193273111] [2021-05-06 08:25:52,515 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 08:25:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:25:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 08:25:52,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:52,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488498209] [2021-05-06 08:25:52,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:52,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193273111] [2021-05-06 08:25:52,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193273111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:25:52,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:25:52,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:25:52,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880641426] [2021-05-06 08:25:52,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:25:52,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:25:52,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:25:52,748 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:25:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:52,757 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-06 08:25:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:25:52,758 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:25:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:52,762 INFO L225 Difference]: With dead ends: 30 [2021-05-06 08:25:52,762 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:25:52,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:25:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:25:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:25:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:25:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 08:25:52,785 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 08:25:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:52,785 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 08:25:52,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:25:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 08:25:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:25:52,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:52,786 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:53,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:25:53,000 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-06 08:25:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793542315] [2021-05-06 08:25:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:53,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:53,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627959619] [2021-05-06 08:25:53,020 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 08:25:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:53,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:25:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:53,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:53,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:53,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:53,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:53,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793542315] [2021-05-06 08:25:53,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627959619] [2021-05-06 08:25:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627959619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:25:53,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:25:53,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:25:53,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112789266] [2021-05-06 08:25:53,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:25:53,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:53,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:25:53,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:25:53,154 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:25:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:53,163 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-06 08:25:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:25:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:25:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:53,165 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:25:53,165 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:25:53,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:25:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:25:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:25:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:25:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 08:25:53,169 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 08:25:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:53,169 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 08:25:53,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:25:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 08:25:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:25:53,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:53,170 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:53,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:53,377 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-06 08:25:53,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:53,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766855710] [2021-05-06 08:25:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:53,388 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:53,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409688628] [2021-05-06 08:25:53,388 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 08:25:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:25:53,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:53,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:53,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:53,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:53,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:53,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766855710] [2021-05-06 08:25:53,562 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:53,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409688628] [2021-05-06 08:25:53,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409688628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:25:53,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:25:53,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:25:53,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190651154] [2021-05-06 08:25:53,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:25:53,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:53,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:25:53,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:25:53,564 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:25:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:55,924 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-06 08:25:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:25:55,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:25:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:55,926 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:25:55,926 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:25:55,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:25:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:25:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-06 08:25:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:25:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-06 08:25:55,930 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2021-05-06 08:25:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:55,930 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-06 08:25:55,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:25:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-06 08:25:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:25:55,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:55,931 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:56,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:56,134 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:56,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-06 08:25:56,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:56,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275122552] [2021-05-06 08:25:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:56,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:56,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360739934] [2021-05-06 08:25:56,144 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 08:25:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:56,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:25:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:56,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:56,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:56,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275122552] [2021-05-06 08:25:56,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:56,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360739934] [2021-05-06 08:25:56,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360739934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:25:56,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:25:56,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:25:56,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448364991] [2021-05-06 08:25:56,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:25:56,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:56,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:25:56,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:25:56,339 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:25:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:56,415 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-06 08:25:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:25:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 08:25:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:56,418 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:25:56,419 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:25:56,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:25:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:25:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-05-06 08:25:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:25:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 08:25:56,432 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 08:25:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:56,433 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 08:25:56,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:25:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 08:25:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:25:56,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:56,435 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:56,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:56,645 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:56,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:56,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-06 08:25:56,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:56,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823362470] [2021-05-06 08:25:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:56,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:56,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995002493] [2021-05-06 08:25:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:25:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:56,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:56,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:56,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823362470] [2021-05-06 08:25:56,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:56,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995002493] [2021-05-06 08:25:56,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995002493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:25:56,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:25:56,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:25:56,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098038109] [2021-05-06 08:25:56,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:25:56,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:25:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:25:56,793 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:25:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:56,816 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-06 08:25:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:25:56,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 08:25:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:56,817 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:25:56,817 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:25:56,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:25:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:25:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:25:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:25:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 08:25:56,820 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 08:25:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:56,821 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 08:25:56,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:25:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 08:25:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:25:56,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:56,821 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:57,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:57,041 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-06 08:25:57,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:57,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406536354] [2021-05-06 08:25:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:57,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:57,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683160248] [2021-05-06 08:25:57,056 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 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 08:25:57,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:25:57,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:25:57,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:25:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:57,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:57,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:57,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406536354] [2021-05-06 08:25:57,248 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:57,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683160248] [2021-05-06 08:25:57,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683160248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:25:57,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:25:57,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:25:57,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540334279] [2021-05-06 08:25:57,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:25:57,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:57,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:25:57,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:25:57,249 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:25:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:57,291 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 08:25:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:25:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 08:25:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:57,292 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:25:57,292 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:25:57,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:25:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:25:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 08:25:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:25:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 08:25:57,295 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 08:25:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:57,296 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 08:25:57,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:25:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 08:25:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:25:57,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:57,297 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:57,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:57,497 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-06 08:25:57,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:57,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227410253] [2021-05-06 08:25:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:57,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:57,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142406348] [2021-05-06 08:25:57,506 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 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 08:25:57,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:25:57,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:25:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:25:57,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:57,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:57,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:57,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227410253] [2021-05-06 08:25:57,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:57,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142406348] [2021-05-06 08:25:57,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142406348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:25:57,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:25:57,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:25:57,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916876114] [2021-05-06 08:25:57,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:25:57,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:25:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:25:57,753 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:25:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:57,808 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-05-06 08:25:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:25:57,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 08:25:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:57,810 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:25:57,810 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:25:57,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:25:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:25:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:25:57,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:25:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 08:25:57,817 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 08:25:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:57,817 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 08:25:57,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:25:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 08:25:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:25:57,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:57,818 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:58,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:58,021 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 4 times [2021-05-06 08:25:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:58,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689400984] [2021-05-06 08:25:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:58,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:58,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818888050] [2021-05-06 08:25:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:25:58,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:25:58,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:25:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:25:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:58,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:58,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689400984] [2021-05-06 08:25:58,250 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818888050] [2021-05-06 08:25:58,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818888050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:25:58,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:25:58,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:25:58,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76082604] [2021-05-06 08:25:58,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:25:58,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:58,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:25:58,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:25:58,252 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:25:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:58,323 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-06 08:25:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:25:58,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 08:25:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:58,324 INFO L225 Difference]: With dead ends: 65 [2021-05-06 08:25:58,324 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:25:58,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:25:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:25:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:25:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:25:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 08:25:58,328 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 08:25:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:58,328 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 08:25:58,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:25:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 08:25:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:25:58,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:58,329 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:58,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:25:58,548 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1572135395, now seen corresponding path program 5 times [2021-05-06 08:25:58,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:58,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670872540] [2021-05-06 08:25:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:58,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:58,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259998202] [2021-05-06 08:25:58,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:25:58,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:25:58,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:25:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:25:58,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:58,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:58,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:58,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670872540] [2021-05-06 08:25:58,758 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:58,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259998202] [2021-05-06 08:25:58,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259998202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:25:58,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:25:58,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:25:58,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393306117] [2021-05-06 08:25:58,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:25:58,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:58,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:25:58,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:25:58,759 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:25:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:58,854 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-05-06 08:25:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:25:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-06 08:25:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:58,855 INFO L225 Difference]: With dead ends: 74 [2021-05-06 08:25:58,855 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 08:25:58,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:25:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 08:25:58,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 08:25:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:25:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-06 08:25:58,859 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-06 08:25:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:58,859 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-06 08:25:58,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:25:58,859 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-06 08:25:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:25:58,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:58,860 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:59,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:59,073 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1651262200, now seen corresponding path program 6 times [2021-05-06 08:25:59,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:59,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489492684] [2021-05-06 08:25:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:59,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:59,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707383361] [2021-05-06 08:25:59,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:59,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:25:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:25:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:25:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:59,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:59,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:59,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489492684] [2021-05-06 08:25:59,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:59,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707383361] [2021-05-06 08:25:59,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707383361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:25:59,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:25:59,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:25:59,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092083152] [2021-05-06 08:25:59,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:25:59,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:59,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:25:59,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:25:59,464 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:25:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:59,548 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-05-06 08:25:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:25:59,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-06 08:25:59,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:59,549 INFO L225 Difference]: With dead ends: 83 [2021-05-06 08:25:59,549 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 08:25:59,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:25:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 08:25:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 08:25:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:25:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-06 08:25:59,553 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-06 08:25:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:59,553 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-06 08:25:59,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:25:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-06 08:25:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:25:59,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:59,554 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:59,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:59,769 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1720170109, now seen corresponding path program 7 times [2021-05-06 08:25:59,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:59,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256293983] [2021-05-06 08:25:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:59,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:59,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099500999] [2021-05-06 08:25:59,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:25:59,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:59,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:59,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:00,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256293983] [2021-05-06 08:26:00,096 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099500999] [2021-05-06 08:26:00,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099500999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:00,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:00,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:26:00,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551880623] [2021-05-06 08:26:00,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:26:00,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:00,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:26:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:26:00,099 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:26:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:00,190 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-06 08:26:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:26:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-06 08:26:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:00,191 INFO L225 Difference]: With dead ends: 92 [2021-05-06 08:26:00,191 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 08:26:00,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:26:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 08:26:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 08:26:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:26:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 08:26:00,195 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-06 08:26:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:00,195 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 08:26:00,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:26:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 08:26:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 08:26:00,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:00,196 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:00,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:26:00,413 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash -327979176, now seen corresponding path program 8 times [2021-05-06 08:26:00,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:00,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109361602] [2021-05-06 08:26:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:00,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:00,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485471737] [2021-05-06 08:26:00,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:00,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:26:00,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:26:00,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:00,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:00,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:00,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109361602] [2021-05-06 08:26:00,681 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:00,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485471737] [2021-05-06 08:26:00,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485471737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:00,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:00,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:26:00,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600670730] [2021-05-06 08:26:00,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:26:00,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:26:00,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:26:00,682 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:26:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:00,798 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-05-06 08:26:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:26:00,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-06 08:26:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:00,799 INFO L225 Difference]: With dead ends: 101 [2021-05-06 08:26:00,799 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 08:26:00,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:26:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 08:26:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 08:26:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:26:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 08:26:00,802 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-06 08:26:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:00,803 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 08:26:00,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:26:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 08:26:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:26:00,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:00,804 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:01,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:01,009 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1572009693, now seen corresponding path program 9 times [2021-05-06 08:26:01,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:01,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775391560] [2021-05-06 08:26:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:01,015 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:01,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144722870] [2021-05-06 08:26:01,015 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:34,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 08:26:34,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:34,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:26:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:34,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:34,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:34,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775391560] [2021-05-06 08:26:34,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:34,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144722870] [2021-05-06 08:26:34,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144722870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:34,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:34,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:26:34,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281654537] [2021-05-06 08:26:34,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:26:34,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:26:34,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:26:34,661 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:26:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:34,782 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-05-06 08:26:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:26:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-06 08:26:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:34,783 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:26:34,783 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:26:34,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:26:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:26:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-06 08:26:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:26:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-06 08:26:34,790 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-06 08:26:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:34,790 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-06 08:26:34,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:26:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-06 08:26:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:26:34,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:34,793 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:35,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:26:35,006 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:35,007 INFO L82 PathProgramCache]: Analyzing trace with hash 191644600, now seen corresponding path program 10 times [2021-05-06 08:26:35,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:35,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649790687] [2021-05-06 08:26:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:35,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:35,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222540861] [2021-05-06 08:26:35,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:35,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:26:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:26:35,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:35,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:35,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649790687] [2021-05-06 08:26:35,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222540861] [2021-05-06 08:26:35,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222540861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:35,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:35,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:26:35,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399606097] [2021-05-06 08:26:35,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:26:35,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:35,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:26:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:26:35,382 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 08:26:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:35,529 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-05-06 08:26:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:26:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2021-05-06 08:26:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:35,530 INFO L225 Difference]: With dead ends: 119 [2021-05-06 08:26:35,530 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 08:26:35,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:26:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 08:26:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 08:26:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:26:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-06 08:26:35,534 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2021-05-06 08:26:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:35,535 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-06 08:26:35,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 08:26:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-06 08:26:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:26:35,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:35,536 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:35,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:35,741 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:35,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1200431299, now seen corresponding path program 11 times [2021-05-06 08:26:35,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:35,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728711082] [2021-05-06 08:26:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:35,747 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:35,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786419723] [2021-05-06 08:26:35,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:35,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 08:26:35,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:35,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:26:35,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:35,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:36,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:36,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728711082] [2021-05-06 08:26:36,067 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:36,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786419723] [2021-05-06 08:26:36,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786419723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:36,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:36,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:26:36,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816324241] [2021-05-06 08:26:36,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:26:36,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:26:36,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:26:36,069 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 08:26:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:36,227 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-05-06 08:26:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:26:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2021-05-06 08:26:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:36,228 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:26:36,228 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:26:36,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:26:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:26:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-06 08:26:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:26:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-06 08:26:36,232 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2021-05-06 08:26:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:36,232 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-06 08:26:36,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 08:26:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-06 08:26:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 08:26:36,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:36,233 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:36,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:26:36,451 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:36,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1791180776, now seen corresponding path program 12 times [2021-05-06 08:26:36,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:36,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621533863] [2021-05-06 08:26:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:36,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:36,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641431543] [2021-05-06 08:26:36,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:36,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 08:26:36,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:36,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:26:36,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:36,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:37,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:37,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621533863] [2021-05-06 08:26:37,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:37,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641431543] [2021-05-06 08:26:37,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641431543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:37,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:37,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:26:37,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187127965] [2021-05-06 08:26:37,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:26:37,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:26:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:26:37,160 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 08:26:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:37,355 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2021-05-06 08:26:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 08:26:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2021-05-06 08:26:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:37,357 INFO L225 Difference]: With dead ends: 137 [2021-05-06 08:26:37,357 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 08:26:37,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:26:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 08:26:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 08:26:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:26:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-05-06 08:26:37,363 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2021-05-06 08:26:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:37,363 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-05-06 08:26:37,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 08:26:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-05-06 08:26:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 08:26:37,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:37,364 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:37,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:26:37,570 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:37,570 INFO L82 PathProgramCache]: Analyzing trace with hash -166555549, now seen corresponding path program 13 times [2021-05-06 08:26:37,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:37,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348832583] [2021-05-06 08:26:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:37,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:37,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650902911] [2021-05-06 08:26:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:37,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:26:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:37,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:37,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348832583] [2021-05-06 08:26:37,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650902911] [2021-05-06 08:26:37,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650902911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:37,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:37,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:26:37,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487897123] [2021-05-06 08:26:37,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:26:37,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:37,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:26:37,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:26:37,969 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 08:26:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:38,149 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2021-05-06 08:26:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 08:26:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2021-05-06 08:26:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:38,151 INFO L225 Difference]: With dead ends: 146 [2021-05-06 08:26:38,151 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 08:26:38,151 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 08:26:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 08:26:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 08:26:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:26:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-05-06 08:26:38,155 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2021-05-06 08:26:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:38,156 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-05-06 08:26:38,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 08:26:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-05-06 08:26:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:26:38,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:38,156 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:38,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:26:38,374 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash -229972872, now seen corresponding path program 14 times [2021-05-06 08:26:38,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:38,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942502743] [2021-05-06 08:26:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:38,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:38,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159591586] [2021-05-06 08:26:38,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:38,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:26:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 08:26:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:38,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:38,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942502743] [2021-05-06 08:26:38,811 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:38,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159591586] [2021-05-06 08:26:38,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159591586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:38,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:38,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:26:38,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045803904] [2021-05-06 08:26:38,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:26:38,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:38,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:26:38,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:26:38,813 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 08:26:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:39,035 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2021-05-06 08:26:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 08:26:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2021-05-06 08:26:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:39,038 INFO L225 Difference]: With dead ends: 155 [2021-05-06 08:26:39,038 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 08:26:39,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:26:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 08:26:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 08:26:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:26:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-05-06 08:26:39,044 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2021-05-06 08:26:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:39,046 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-05-06 08:26:39,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 08:26:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-05-06 08:26:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 08:26:39,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:39,047 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:39,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:26:39,259 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:39,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1480022019, now seen corresponding path program 15 times [2021-05-06 08:26:39,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:39,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555845470] [2021-05-06 08:26:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:39,265 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:39,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349790435] [2021-05-06 08:26:39,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:44,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 08:26:44,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:26:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:44,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:44,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:45,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:45,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555845470] [2021-05-06 08:26:45,265 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:45,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349790435] [2021-05-06 08:26:45,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349790435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:45,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:45,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:26:45,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946987305] [2021-05-06 08:26:45,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:26:45,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:26:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:26:45,267 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 08:26:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:45,514 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2021-05-06 08:26:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 08:26:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2021-05-06 08:26:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:45,515 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:26:45,515 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:26:45,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 08:26:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:26:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-06 08:26:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:26:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-05-06 08:26:45,519 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2021-05-06 08:26:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:45,519 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-05-06 08:26:45,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 08:26:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-05-06 08:26:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-06 08:26:45,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:45,520 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:45,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:45,727 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2105323736, now seen corresponding path program 16 times [2021-05-06 08:26:45,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:45,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522456102] [2021-05-06 08:26:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:45,732 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:45,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345307698] [2021-05-06 08:26:45,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:45,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:26:45,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:45,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 08:26:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:45,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:45,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:46,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:46,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522456102] [2021-05-06 08:26:46,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:46,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345307698] [2021-05-06 08:26:46,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345307698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:46,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:46,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:26:46,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018337352] [2021-05-06 08:26:46,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:26:46,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:46,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:26:46,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:26:46,187 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 08:26:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:46,449 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2021-05-06 08:26:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 08:26:46,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2021-05-06 08:26:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:46,450 INFO L225 Difference]: With dead ends: 173 [2021-05-06 08:26:46,450 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 08:26:46,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 08:26:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 08:26:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 08:26:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:26:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2021-05-06 08:26:46,454 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2021-05-06 08:26:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:46,454 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2021-05-06 08:26:46,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 08:26:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2021-05-06 08:26:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 08:26:46,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:46,455 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:46,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:46,660 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:46,660 INFO L82 PathProgramCache]: Analyzing trace with hash -170559581, now seen corresponding path program 17 times [2021-05-06 08:26:46,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:46,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981257412] [2021-05-06 08:26:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:46,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:46,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610644865] [2021-05-06 08:26:46,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:46,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 08:26:46,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 08:26:46,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:46,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:47,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981257412] [2021-05-06 08:26:47,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610644865] [2021-05-06 08:26:47,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610644865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:47,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:47,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 08:26:47,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196093001] [2021-05-06 08:26:47,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:26:47,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:26:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:26:47,144 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 08:26:47,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:47,438 INFO L93 Difference]: Finished difference Result 182 states and 201 transitions. [2021-05-06 08:26:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 08:26:47,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2021-05-06 08:26:47,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:47,439 INFO L225 Difference]: With dead ends: 182 [2021-05-06 08:26:47,439 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 08:26:47,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 08:26:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 08:26:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-06 08:26:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:26:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-05-06 08:26:47,443 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2021-05-06 08:26:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:47,443 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-05-06 08:26:47,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 08:26:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-05-06 08:26:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-06 08:26:47,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:47,444 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:47,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:26:47,661 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash -466082504, now seen corresponding path program 18 times [2021-05-06 08:26:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:47,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208318303] [2021-05-06 08:26:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:47,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:47,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160546532] [2021-05-06 08:26:47,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:55,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 08:26:55,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 08:26:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:55,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:55,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:55,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208318303] [2021-05-06 08:26:55,864 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:55,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160546532] [2021-05-06 08:26:55,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160546532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:55,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:55,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 08:26:55,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029856997] [2021-05-06 08:26:55,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 08:26:55,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:55,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 08:26:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:26:55,865 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 08:26:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:56,169 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2021-05-06 08:26:56,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 08:26:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2021-05-06 08:26:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:56,170 INFO L225 Difference]: With dead ends: 191 [2021-05-06 08:26:56,170 INFO L226 Difference]: Without dead ends: 191 [2021-05-06 08:26:56,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 08:26:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-06 08:26:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-06 08:26:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 08:26:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-05-06 08:26:56,174 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2021-05-06 08:26:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:56,174 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-05-06 08:26:56,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 08:26:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-05-06 08:26:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 08:26:56,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:56,175 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:56,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:56,377 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -733548733, now seen corresponding path program 19 times [2021-05-06 08:26:56,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:56,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560447802] [2021-05-06 08:26:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:56,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:56,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067521433] [2021-05-06 08:26:56,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:56,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:26:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:56,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:56,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:56,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560447802] [2021-05-06 08:26:56,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:56,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067521433] [2021-05-06 08:26:56,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067521433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:56,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:56,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:26:56,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925938377] [2021-05-06 08:26:56,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:26:56,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:56,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:26:56,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:26:56,961 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 08:26:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:57,317 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2021-05-06 08:26:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 08:26:57,319 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2021-05-06 08:26:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:57,319 INFO L225 Difference]: With dead ends: 200 [2021-05-06 08:26:57,320 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 08:26:57,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 08:26:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 08:26:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-06 08:26:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:26:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-05-06 08:26:57,324 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2021-05-06 08:26:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:57,324 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-05-06 08:26:57,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 08:26:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-05-06 08:26:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-06 08:26:57,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:57,325 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:57,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:26:57,531 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2040315496, now seen corresponding path program 20 times [2021-05-06 08:26:57,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:57,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081493837] [2021-05-06 08:26:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:57,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:57,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902202752] [2021-05-06 08:26:57,537 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:57,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:26:57,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:57,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:26:57,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:57,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:57,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:58,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:58,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081493837] [2021-05-06 08:26:58,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:58,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902202752] [2021-05-06 08:26:58,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902202752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:58,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:58,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 08:26:58,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749550148] [2021-05-06 08:26:58,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 08:26:58,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:58,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 08:26:58,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:26:58,108 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 08:26:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:58,458 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2021-05-06 08:26:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 08:26:58,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2021-05-06 08:26:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:58,459 INFO L225 Difference]: With dead ends: 209 [2021-05-06 08:26:58,459 INFO L226 Difference]: Without dead ends: 209 [2021-05-06 08:26:58,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 08:26:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-06 08:26:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-05-06 08:26:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:26:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-05-06 08:26:58,465 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2021-05-06 08:26:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:58,465 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-05-06 08:26:58,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 08:26:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-05-06 08:26:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-06 08:26:58,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:58,466 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:58,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:58,674 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash 375766755, now seen corresponding path program 21 times [2021-05-06 08:26:58,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:58,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155563225] [2021-05-06 08:26:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:58,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:58,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791221253] [2021-05-06 08:26:58,700 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:02,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-06 08:27:02,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:02,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 08:27:02,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:03,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:03,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:03,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155563225] [2021-05-06 08:27:03,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:03,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791221253] [2021-05-06 08:27:03,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791221253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:03,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:03,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-06 08:27:03,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929869651] [2021-05-06 08:27:03,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 08:27:03,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 08:27:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:27:03,475 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 08:27:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:03,838 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2021-05-06 08:27:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 08:27:03,838 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2021-05-06 08:27:03,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:03,839 INFO L225 Difference]: With dead ends: 218 [2021-05-06 08:27:03,839 INFO L226 Difference]: Without dead ends: 218 [2021-05-06 08:27:03,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 08:27:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-06 08:27:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-05-06 08:27:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:27:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2021-05-06 08:27:03,850 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2021-05-06 08:27:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:03,850 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2021-05-06 08:27:03,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 08:27:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2021-05-06 08:27:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-06 08:27:03,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:03,853 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:04,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:27:04,063 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:04,063 INFO L82 PathProgramCache]: Analyzing trace with hash -698087944, now seen corresponding path program 22 times [2021-05-06 08:27:04,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:04,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044716190] [2021-05-06 08:27:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:04,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:04,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183861942] [2021-05-06 08:27:04,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:04,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:27:04,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:04,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 08:27:04,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:04,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:04,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:04,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044716190] [2021-05-06 08:27:04,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:04,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183861942] [2021-05-06 08:27:04,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183861942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:04,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:04,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 08:27:04,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226468372] [2021-05-06 08:27:04,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 08:27:04,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 08:27:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:27:04,850 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2021-05-06 08:27:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:05,249 INFO L93 Difference]: Finished difference Result 227 states and 251 transitions. [2021-05-06 08:27:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 08:27:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2021-05-06 08:27:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:05,250 INFO L225 Difference]: With dead ends: 227 [2021-05-06 08:27:05,250 INFO L226 Difference]: Without dead ends: 227 [2021-05-06 08:27:05,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 08:27:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-06 08:27:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-05-06 08:27:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:27:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2021-05-06 08:27:05,254 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2021-05-06 08:27:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:05,254 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2021-05-06 08:27:05,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2021-05-06 08:27:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2021-05-06 08:27:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-06 08:27:05,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:05,255 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:05,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:27:05,461 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:05,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1668553085, now seen corresponding path program 23 times [2021-05-06 08:27:05,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:05,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960915128] [2021-05-06 08:27:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:05,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:05,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293807310] [2021-05-06 08:27:05,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:05,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-06 08:27:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:05,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 08:27:05,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:05,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:06,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:06,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960915128] [2021-05-06 08:27:06,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:06,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293807310] [2021-05-06 08:27:06,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293807310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:06,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:06,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-06 08:27:06,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125998377] [2021-05-06 08:27:06,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 08:27:06,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:06,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 08:27:06,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:27:06,336 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2021-05-06 08:27:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:06,733 INFO L93 Difference]: Finished difference Result 236 states and 261 transitions. [2021-05-06 08:27:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 08:27:06,733 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2021-05-06 08:27:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:06,734 INFO L225 Difference]: With dead ends: 236 [2021-05-06 08:27:06,734 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 08:27:06,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 08:27:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 08:27:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-05-06 08:27:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 08:27:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2021-05-06 08:27:06,738 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2021-05-06 08:27:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:06,739 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2021-05-06 08:27:06,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2021-05-06 08:27:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2021-05-06 08:27:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-05-06 08:27:06,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:06,740 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:06,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:27:06,945 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1189055912, now seen corresponding path program 24 times [2021-05-06 08:27:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:06,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756811919] [2021-05-06 08:27:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:06,969 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:06,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288488253] [2021-05-06 08:27:06,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:26,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-06 08:27:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:26,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:27:26,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:26,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:27,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756811919] [2021-05-06 08:27:27,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288488253] [2021-05-06 08:27:27,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288488253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:27,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:27,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 08:27:27,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269864446] [2021-05-06 08:27:27,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 08:27:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:27,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 08:27:27,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:27:27,212 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2021-05-06 08:27:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:27,652 INFO L93 Difference]: Finished difference Result 245 states and 271 transitions. [2021-05-06 08:27:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 08:27:27,653 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2021-05-06 08:27:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:27,654 INFO L225 Difference]: With dead ends: 245 [2021-05-06 08:27:27,654 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 08:27:27,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 08:27:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 08:27:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-05-06 08:27:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:27:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2021-05-06 08:27:27,658 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2021-05-06 08:27:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:27,658 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2021-05-06 08:27:27,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2021-05-06 08:27:27,658 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2021-05-06 08:27:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-06 08:27:27,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:27,659 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:27,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:27:27,870 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:27,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1533843933, now seen corresponding path program 25 times [2021-05-06 08:27:27,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:27,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417753190] [2021-05-06 08:27:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:27,877 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:27,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473445626] [2021-05-06 08:27:27,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:27,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 08:27:27,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:27,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:28,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417753190] [2021-05-06 08:27:28,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473445626] [2021-05-06 08:27:28,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473445626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:28,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:28,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-06 08:27:28,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882136291] [2021-05-06 08:27:28,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 08:27:28,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:28,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 08:27:28,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:27:28,568 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2021-05-06 08:27:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:29,101 INFO L93 Difference]: Finished difference Result 254 states and 281 transitions. [2021-05-06 08:27:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 08:27:29,101 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2021-05-06 08:27:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:29,102 INFO L225 Difference]: With dead ends: 254 [2021-05-06 08:27:29,102 INFO L226 Difference]: Without dead ends: 254 [2021-05-06 08:27:29,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 08:27:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-06 08:27:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-05-06 08:27:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:27:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2021-05-06 08:27:29,107 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2021-05-06 08:27:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:29,107 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2021-05-06 08:27:29,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2021-05-06 08:27:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2021-05-06 08:27:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-05-06 08:27:29,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:29,108 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:29,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:27:29,322 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash -436304200, now seen corresponding path program 26 times [2021-05-06 08:27:29,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:29,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519472883] [2021-05-06 08:27:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:29,329 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:29,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310245954] [2021-05-06 08:27:29,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:29,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:27:29,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:29,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 08:27:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:29,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:29,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:30,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:30,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:30,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:30,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519472883] [2021-05-06 08:27:30,032 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:30,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310245954] [2021-05-06 08:27:30,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310245954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:30,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:30,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-06 08:27:30,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777386405] [2021-05-06 08:27:30,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 08:27:30,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:30,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 08:27:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 08:27:30,033 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2021-05-06 08:27:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:30,512 INFO L93 Difference]: Finished difference Result 263 states and 291 transitions. [2021-05-06 08:27:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 08:27:30,512 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2021-05-06 08:27:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:30,513 INFO L225 Difference]: With dead ends: 263 [2021-05-06 08:27:30,513 INFO L226 Difference]: Without dead ends: 263 [2021-05-06 08:27:30,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 08:27:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-06 08:27:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-05-06 08:27:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 08:27:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2021-05-06 08:27:30,517 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2021-05-06 08:27:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:30,518 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2021-05-06 08:27:30,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2021-05-06 08:27:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2021-05-06 08:27:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-06 08:27:30,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:30,519 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:30,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:30,733 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1775648195, now seen corresponding path program 27 times [2021-05-06 08:27:30,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:30,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019221957] [2021-05-06 08:27:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:30,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:30,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488397011] [2021-05-06 08:27:30,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:42,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-06 08:27:42,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:42,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 08:27:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:42,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:42,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:42,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019221957] [2021-05-06 08:27:42,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:42,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488397011] [2021-05-06 08:27:42,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488397011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:42,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:42,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-06 08:27:42,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647099995] [2021-05-06 08:27:42,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 08:27:42,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:42,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 08:27:43,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:27:43,000 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2021-05-06 08:27:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:43,539 INFO L93 Difference]: Finished difference Result 272 states and 301 transitions. [2021-05-06 08:27:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 08:27:43,540 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2021-05-06 08:27:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:43,541 INFO L225 Difference]: With dead ends: 272 [2021-05-06 08:27:43,541 INFO L226 Difference]: Without dead ends: 272 [2021-05-06 08:27:43,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 08:27:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-06 08:27:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-05-06 08:27:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:27:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2021-05-06 08:27:43,545 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2021-05-06 08:27:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:43,545 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2021-05-06 08:27:43,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2021-05-06 08:27:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2021-05-06 08:27:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-05-06 08:27:43,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:43,546 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:43,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:43,750 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1189364504, now seen corresponding path program 28 times [2021-05-06 08:27:43,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:43,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036719356] [2021-05-06 08:27:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:43,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:43,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256771032] [2021-05-06 08:27:43,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:43,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:27:43,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:27:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:43,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:44,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:44,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036719356] [2021-05-06 08:27:44,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:44,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256771032] [2021-05-06 08:27:44,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256771032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:44,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:44,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 08:27:44,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898163367] [2021-05-06 08:27:44,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 08:27:44,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:44,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 08:27:44,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:27:44,547 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2021-05-06 08:27:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:45,077 INFO L93 Difference]: Finished difference Result 281 states and 311 transitions. [2021-05-06 08:27:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 08:27:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2021-05-06 08:27:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:45,078 INFO L225 Difference]: With dead ends: 281 [2021-05-06 08:27:45,078 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 08:27:45,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 663.8ms TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 08:27:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 08:27:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-05-06 08:27:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:27:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2021-05-06 08:27:45,088 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2021-05-06 08:27:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:45,088 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2021-05-06 08:27:45,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2021-05-06 08:27:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2021-05-06 08:27:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-06 08:27:45,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:45,089 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:45,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:27:45,309 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash -986813085, now seen corresponding path program 29 times [2021-05-06 08:27:45,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:45,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557621333] [2021-05-06 08:27:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:45,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:45,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194551601] [2021-05-06 08:27:45,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:58,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-06 08:27:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:58,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 08:27:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:58,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:58,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:58,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557621333] [2021-05-06 08:27:58,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:58,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194551601] [2021-05-06 08:27:58,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194551601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:58,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:58,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-06 08:27:58,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292608044] [2021-05-06 08:27:58,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 08:27:58,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 08:27:58,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 08:27:58,856 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2021-05-06 08:27:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:59,438 INFO L93 Difference]: Finished difference Result 290 states and 321 transitions. [2021-05-06 08:27:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 08:27:59,438 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2021-05-06 08:27:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:59,439 INFO L225 Difference]: With dead ends: 290 [2021-05-06 08:27:59,440 INFO L226 Difference]: Without dead ends: 290 [2021-05-06 08:27:59,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 726.6ms TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 08:27:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-06 08:27:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-05-06 08:27:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:27:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2021-05-06 08:27:59,445 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2021-05-06 08:27:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:59,445 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2021-05-06 08:27:59,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2021-05-06 08:27:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2021-05-06 08:27:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-05-06 08:27:59,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:59,447 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:59,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:59,658 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:59,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:59,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1480042360, now seen corresponding path program 30 times [2021-05-06 08:27:59,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:59,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573508270] [2021-05-06 08:27:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:59,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:59,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363119465] [2021-05-06 08:27:59,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:26,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-06 08:28:26,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:26,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 08:28:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:26,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:27,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:27,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573508270] [2021-05-06 08:28:27,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:27,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363119465] [2021-05-06 08:28:27,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363119465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:27,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:27,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-06 08:28:27,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756107305] [2021-05-06 08:28:27,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 08:28:27,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 08:28:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 08:28:27,675 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2021-05-06 08:28:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:28,243 INFO L93 Difference]: Finished difference Result 299 states and 331 transitions. [2021-05-06 08:28:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 08:28:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2021-05-06 08:28:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:28,245 INFO L225 Difference]: With dead ends: 299 [2021-05-06 08:28:28,245 INFO L226 Difference]: Without dead ends: 299 [2021-05-06 08:28:28,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 755.2ms TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 08:28:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-06 08:28:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2021-05-06 08:28:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:28:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2021-05-06 08:28:28,255 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2021-05-06 08:28:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:28,255 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2021-05-06 08:28:28,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2021-05-06 08:28:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2021-05-06 08:28:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-05-06 08:28:28,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:28,257 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:28,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:28:28,473 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash -856296189, now seen corresponding path program 31 times [2021-05-06 08:28:28,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:28,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331108165] [2021-05-06 08:28:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:28,479 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:28,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13933093] [2021-05-06 08:28:28,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:28,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:28:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:28,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:28,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:29,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:29,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331108165] [2021-05-06 08:28:29,345 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:29,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13933093] [2021-05-06 08:28:29,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13933093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:29,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:29,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-06 08:28:29,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275249972] [2021-05-06 08:28:29,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 08:28:29,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:29,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 08:28:29,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 08:28:29,346 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2021-05-06 08:28:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:30,003 INFO L93 Difference]: Finished difference Result 308 states and 341 transitions. [2021-05-06 08:28:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 08:28:30,004 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2021-05-06 08:28:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:30,007 INFO L225 Difference]: With dead ends: 308 [2021-05-06 08:28:30,007 INFO L226 Difference]: Without dead ends: 308 [2021-05-06 08:28:30,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 804.5ms TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 08:28:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-06 08:28:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-05-06 08:28:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:28:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2021-05-06 08:28:30,018 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2021-05-06 08:28:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:30,018 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2021-05-06 08:28:30,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2021-05-06 08:28:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2021-05-06 08:28:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-05-06 08:28:30,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:30,020 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:30,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:30,253 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:30,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1998670888, now seen corresponding path program 32 times [2021-05-06 08:28:30,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:30,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812423818] [2021-05-06 08:28:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:30,258 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:30,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996470576] [2021-05-06 08:28:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:30,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:28:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 08:28:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:30,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:30,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:31,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:31,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812423818] [2021-05-06 08:28:31,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:31,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996470576] [2021-05-06 08:28:31,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996470576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:31,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:31,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-06 08:28:31,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576802216] [2021-05-06 08:28:31,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 08:28:31,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 08:28:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 08:28:31,180 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2021-05-06 08:28:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:31,846 INFO L93 Difference]: Finished difference Result 317 states and 351 transitions. [2021-05-06 08:28:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 08:28:31,847 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2021-05-06 08:28:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:31,848 INFO L225 Difference]: With dead ends: 317 [2021-05-06 08:28:31,848 INFO L226 Difference]: Without dead ends: 317 [2021-05-06 08:28:31,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 837.2ms TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 08:28:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-06 08:28:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2021-05-06 08:28:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 08:28:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2021-05-06 08:28:31,852 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2021-05-06 08:28:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:31,852 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2021-05-06 08:28:31,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2021-05-06 08:28:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2021-05-06 08:28:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-05-06 08:28:31,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:31,853 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:32,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 08:28:32,069 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1963381923, now seen corresponding path program 33 times [2021-05-06 08:28:32,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:32,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543685278] [2021-05-06 08:28:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:32,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:32,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114177159] [2021-05-06 08:28:32,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true