/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:57:43,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:57:43,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:57:43,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:57:43,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:57:43,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:57:43,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:57:43,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:57:43,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:57:43,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:57:43,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:57:43,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:57:43,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:57:43,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:57:43,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:57:43,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:57:43,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:57:43,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:57:43,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:57:43,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:57:43,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:57:43,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:57:43,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:57:43,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:57:43,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:57:43,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:57:43,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:57:43,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:57:43,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:57:43,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:57:43,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:57:43,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:57:43,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:57:43,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:57:43,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:57:43,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:57:43,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:57:43,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:57:43,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:57:43,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:57:43,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:57:43,604 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:57:43,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:57:43,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:57:43,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:57:43,617 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:57:43,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:57:43,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:57:43,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:57:43,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:57:43,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:57:43,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:57:43,619 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:57:43,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:57:43,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:57:43,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:57:43,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:57:43,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:57:43,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:57:43,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:57:43,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:57:43,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:57:43,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:57:43,620 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:57:43,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:57:43,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:57:43,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:57:43,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:57:43,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:57:43,871 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:57:43,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2021-05-02 20:57:43,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7677067bb/a0c3eb50cc3842b9882d2b32a64edd74/FLAG266395383 [2021-05-02 20:57:44,266 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:57:44,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2021-05-02 20:57:44,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7677067bb/a0c3eb50cc3842b9882d2b32a64edd74/FLAG266395383 [2021-05-02 20:57:44,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7677067bb/a0c3eb50cc3842b9882d2b32a64edd74 [2021-05-02 20:57:44,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:57:44,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:57:44,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:57:44,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:57:44,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:57:44,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4745e705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44, skipping insertion in model container [2021-05-02 20:57:44,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:57:44,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:57:44,806 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c[545,558] [2021-05-02 20:57:44,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:57:44,824 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:57:44,833 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c[545,558] [2021-05-02 20:57:44,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:57:44,847 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:57:44,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44 WrapperNode [2021-05-02 20:57:44,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:57:44,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:57:44,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:57:44,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:57:44,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (1/1) ... [2021-05-02 20:57:44,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:57:44,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:57:44,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:57:44,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:57:44,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:57:44,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:57:44,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:57:44,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:57:44,997 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:57:44,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:57:44,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:57:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:57:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:57:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:57:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:57:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:57:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:57:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:57:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:57:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:57:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:57:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:57:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:57:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:57:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:57:45,249 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:57:45,249 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:57:45,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:57:45 BoogieIcfgContainer [2021-05-02 20:57:45,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:57:45,251 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:57:45,251 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:57:45,251 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:57:45,253 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:57:45" (1/1) ... [2021-05-02 20:57:45,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:57:45 BasicIcfg [2021-05-02 20:57:45,264 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:57:45,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:57:45,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:57:45,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:57:45,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:57:44" (1/4) ... [2021-05-02 20:57:45,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e09e844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:57:45, skipping insertion in model container [2021-05-02 20:57:45,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:57:44" (2/4) ... [2021-05-02 20:57:45,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e09e844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:57:45, skipping insertion in model container [2021-05-02 20:57:45,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:57:45" (3/4) ... [2021-05-02 20:57:45,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e09e844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:57:45, skipping insertion in model container [2021-05-02 20:57:45,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:57:45" (4/4) ... [2021-05-02 20:57:45,269 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.cJordan [2021-05-02 20:57:45,276 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:57:45,279 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:57:45,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:57:45,310 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:57:45,311 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:57:45,311 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:57:45,311 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:57:45,311 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:57:45,311 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:57:45,311 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:57:45,311 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:57:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:57:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:57:45,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:45,330 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:45,330 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:45,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:57:45,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:45,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937318529] [2021-05-02 20:57:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:57:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:57:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:57:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:57:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:57:45,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:45,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937318529] [2021-05-02 20:57:45,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937318529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:57:45,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:57:45,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:57:45,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224624307] [2021-05-02 20:57:45,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:57:45,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:45,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:57:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:57:45,591 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:57:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:45,733 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:57:45,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:57:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 20:57:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:45,739 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:57:45,739 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:57:45,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:57:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:57:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:57:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:57:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:57:45,763 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:57:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:45,763 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:57:45,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:57:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:57:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:57:45,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:45,765 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:45,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:57:45,765 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:57:45,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:45,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345894234] [2021-05-02 20:57:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:57:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:57:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:57:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:57:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:57:45,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:45,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345894234] [2021-05-02 20:57:45,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345894234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:57:45,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:57:45,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:57:45,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73821449] [2021-05-02 20:57:45,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:57:45,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:57:45,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:57:45,872 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 20:57:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:46,158 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:57:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:57:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 20:57:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:46,161 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:57:46,161 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:57:46,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:57:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:57:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:57:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:57:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:57:46,167 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:57:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:46,168 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:57:46,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 20:57:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:57:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:57:46,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:46,168 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:46,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:57:46,169 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:57:46,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:46,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124667178] [2021-05-02 20:57:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:46,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:57:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:46,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:57:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:46,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:57:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:46,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:57:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:46,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:57:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:57:46,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:46,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124667178] [2021-05-02 20:57:46,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124667178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:57:46,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:57:46,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:57:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831581420] [2021-05-02 20:57:46,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:57:46,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:46,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:57:46,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:57:46,336 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:57:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:46,557 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:57:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:57:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:57:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:46,558 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:57:46,558 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:57:46,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:57:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:57:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:57:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:57:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:57:46,562 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:57:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:46,562 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:57:46,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:57:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:57:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:57:46,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:46,563 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:46,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:57:46,564 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:46,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:57:46,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:46,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478899997] [2021-05-02 20:57:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:46,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:46,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070474846] [2021-05-02 20:57:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:57:46,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:46,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:46,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:46,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:46,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:46,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 20:57:46,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:46,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478899997] [2021-05-02 20:57:46,811 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:46,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070474846] [2021-05-02 20:57:46,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070474846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:46,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:46,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:57:46,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797265977] [2021-05-02 20:57:46,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:57:46,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:57:46,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:57:46,813 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:57:46,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:46,923 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-02 20:57:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:57:46,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 20:57:46,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:46,925 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:57:46,925 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:57:46,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:57:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:57:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 20:57:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:57:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 20:57:46,937 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 20:57:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:46,938 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 20:57:46,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:57:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 20:57:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:57:46,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:46,940 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:47,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:47,160 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:47,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:47,161 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:57:47,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:47,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889338416] [2021-05-02 20:57:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:47,198 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:47,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099233857] [2021-05-02 20:57:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:57:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 20:57:47,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:47,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889338416] [2021-05-02 20:57:47,432 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:47,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099233857] [2021-05-02 20:57:47,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099233857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:47,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:47,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:57:47,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760122336] [2021-05-02 20:57:47,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:57:47,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:47,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:57:47,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:57:47,433 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:57:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:47,572 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 20:57:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:57:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-05-02 20:57:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:47,573 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:57:47,573 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:57:47,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:57:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:57:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:57:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:57:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:57:47,577 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 20:57:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:47,577 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:57:47,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:57:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:57:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:57:47,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:47,578 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:47,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:47,789 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:47,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:57:47,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:47,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892548679] [2021-05-02 20:57:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:47,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:47,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938417934] [2021-05-02 20:57:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:47,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:57:47,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:47,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:47,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:57:48,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:48,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892548679] [2021-05-02 20:57:48,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:48,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938417934] [2021-05-02 20:57:48,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938417934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:48,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:48,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:57:48,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278359681] [2021-05-02 20:57:48,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:57:48,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:48,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:57:48,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:57:48,146 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:57:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:48,364 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-05-02 20:57:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:57:48,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 20:57:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:48,365 INFO L225 Difference]: With dead ends: 71 [2021-05-02 20:57:48,365 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 20:57:48,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:57:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 20:57:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 20:57:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:57:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-05-02 20:57:48,369 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 55 [2021-05-02 20:57:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:48,370 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-05-02 20:57:48,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:57:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-05-02 20:57:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:57:48,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:48,371 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:48,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:48,574 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-02 20:57:48,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:48,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630743497] [2021-05-02 20:57:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:48,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:48,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892066866] [2021-05-02 20:57:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:57:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:48,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:57:48,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630743497] [2021-05-02 20:57:48,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892066866] [2021-05-02 20:57:48,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892066866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:48,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:48,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:57:48,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902038474] [2021-05-02 20:57:48,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:57:48,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:48,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:57:48,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:57:48,903 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:57:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:49,039 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2021-05-02 20:57:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:57:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 62 [2021-05-02 20:57:49,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:49,040 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:57:49,040 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:57:49,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:57:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:57:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 20:57:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:57:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-05-02 20:57:49,045 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 62 [2021-05-02 20:57:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:49,045 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-05-02 20:57:49,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:57:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-05-02 20:57:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:57:49,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:49,046 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:49,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:49,249 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:49,249 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:57:49,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:49,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403890151] [2021-05-02 20:57:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:49,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:49,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826983002] [2021-05-02 20:57:49,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:49,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:57:49,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:57:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:57:49,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:49,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:49,999 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-05-02 20:57:50,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:50,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 83 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 20:57:50,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:50,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403890151] [2021-05-02 20:57:50,106 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:50,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826983002] [2021-05-02 20:57:50,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826983002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:50,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:50,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:57:50,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748741405] [2021-05-02 20:57:50,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:57:50,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:50,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:57:50,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:57:50,108 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 20:57:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:52,418 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-05-02 20:57:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:57:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 72 [2021-05-02 20:57:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:52,420 INFO L225 Difference]: With dead ends: 76 [2021-05-02 20:57:52,420 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:57:52,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:57:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:57:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-02 20:57:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:57:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-05-02 20:57:52,425 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 72 [2021-05-02 20:57:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:52,426 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-05-02 20:57:52,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 20:57:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-05-02 20:57:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:57:52,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:52,427 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:52,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:52,637 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 20:57:52,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:52,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870393633] [2021-05-02 20:57:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:52,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:52,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562207201] [2021-05-02 20:57:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 20:57:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:52,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:52,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:53,423 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-05-02 20:57:53,786 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-02 20:58:08,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:08,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:09,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:10,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:59:15,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:59:16,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:59:16,749 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 2286 DAG size of output: 2176