/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/cohencu-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:33:38,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:33:38,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:33:38,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:33:38,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:33:38,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:33:38,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:33:38,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:33:38,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:33:38,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:33:38,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:33:38,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:33:38,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:33:38,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:33:38,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:33:38,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:33:38,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:33:38,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:33:38,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:33:38,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:33:38,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:33:38,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:33:38,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:33:38,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:33:38,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 19:33:38,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 19:33:38,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 19:33:38,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 19:33:38,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 19:33:38,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 19:33:38,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 19:33:38,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 19:33:38,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 19:33:38,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 19:33:38,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 19:33:38,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 19:33:38,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 19:33:38,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 19:33:38,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:33:38,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:33:38,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:33:38,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:33:38,571 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:33:38,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:33:38,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:33:38,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:33:38,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:33:38,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:33:38,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:33:38,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:33:38,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:33:38,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:33:38,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:33:38,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:33:38,573 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:33:38,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:33:38,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:33:38,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:33:38,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:33:38,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:33:38,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:33:38,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:33:38,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:33:38,575 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:33:38,575 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:33:38,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:33:38,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:33:38,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:33:38,833 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:33:38,833 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:33:38,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2021-05-02 19:33:38,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305993aa9/ab7481eb1ca344fbb686e471e4fe82bd/FLAGaed5a885c [2021-05-02 19:33:39,272 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:33:39,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2021-05-02 19:33:39,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305993aa9/ab7481eb1ca344fbb686e471e4fe82bd/FLAGaed5a885c [2021-05-02 19:33:39,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305993aa9/ab7481eb1ca344fbb686e471e4fe82bd [2021-05-02 19:33:39,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:33:39,295 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:33:39,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:33:39,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:33:39,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:33:39,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aaa3813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39, skipping insertion in model container [2021-05-02 19:33:39,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:33:39,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:33:39,435 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/cohencu-ll_valuebound1.c[596,609] [2021-05-02 19:33:39,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:33:39,467 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:33:39,476 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/cohencu-ll_valuebound1.c[596,609] [2021-05-02 19:33:39,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:33:39,537 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:33:39,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39 WrapperNode [2021-05-02 19:33:39,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:33:39,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:33:39,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:33:39,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:33:39,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:33:39,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:33:39,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:33:39,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:33:39,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (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 19:33:39,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:33:39,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:33:39,634 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:33:39,634 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:33:39,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:33:39,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:33:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:33:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:33:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:33:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:33:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 19:33:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:33:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:33:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:33:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:33:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:33:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:33:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:33:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:33:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:33:39,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:33:39,863 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:33:39,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:33:39 BoogieIcfgContainer [2021-05-02 19:33:39,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:33:39,865 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:33:39,865 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:33:39,866 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:33:39,867 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:33:39" (1/1) ... [2021-05-02 19:33:39,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:33:39 BasicIcfg [2021-05-02 19:33:39,881 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:33:39,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:33:39,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:33:39,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:33:39,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:33:39" (1/4) ... [2021-05-02 19:33:39,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9befc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:33:39, skipping insertion in model container [2021-05-02 19:33:39,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:39" (2/4) ... [2021-05-02 19:33:39,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9befc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:33:39, skipping insertion in model container [2021-05-02 19:33:39,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:33:39" (3/4) ... [2021-05-02 19:33:39,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9befc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:33:39, skipping insertion in model container [2021-05-02 19:33:39,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:33:39" (4/4) ... [2021-05-02 19:33:39,886 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound1.cJordan [2021-05-02 19:33:39,889 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:33:39,891 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:33:39,912 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:33:39,936 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:33:39,936 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:33:39,936 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:33:39,936 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:33:39,936 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:33:39,936 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:33:39,936 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:33:39,937 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:33:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:33:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:33:39,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:39,962 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:39,962 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:39,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2021-05-02 19:33:39,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:39,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250099068] [2021-05-02 19:33:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:40,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:33:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:40,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:33:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:33:40,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:40,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250099068] [2021-05-02 19:33:40,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250099068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:33:40,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:33:40,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:33:40,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884710846] [2021-05-02 19:33:40,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:33:40,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:40,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:33:40,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:33:40,235 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:33:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:40,370 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-02 19:33:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:33:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:33:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:40,376 INFO L225 Difference]: With dead ends: 36 [2021-05-02 19:33:40,376 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 19:33:40,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:33:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 19:33:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 19:33:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:33:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-02 19:33:40,407 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-02 19:33:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:40,408 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-02 19:33:40,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:33:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-02 19:33:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:33:40,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:40,408 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:40,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:33:40,409 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2021-05-02 19:33:40,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:40,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704014862] [2021-05-02 19:33:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:40,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:33:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:40,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:33:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:33:40,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:40,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704014862] [2021-05-02 19:33:40,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704014862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:33:40,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:33:40,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:33:40,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350203434] [2021-05-02 19:33:40,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:33:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:40,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:33:40,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:33:40,596 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:33:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:40,935 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 19:33:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:33:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:33:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:40,937 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:33:40,937 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:33:40,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:40,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:33:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 19:33:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:33:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 19:33:40,943 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-02 19:33:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:40,943 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 19:33:40,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:33:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 19:33:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:33:40,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:40,944 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:40,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:33:40,944 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2021-05-02 19:33:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:40,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792110457] [2021-05-02 19:33:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:40,952 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349774293] [2021-05-02 19:33:40,953 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 19:33:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:41,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:33:41,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:33:41,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792110457] [2021-05-02 19:33:41,154 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349774293] [2021-05-02 19:33:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349774293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:41,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:41,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:33:41,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219991285] [2021-05-02 19:33:41,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:33:41,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:33:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:33:41,155 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:33:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:41,351 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-02 19:33:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:33:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 19:33:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:41,352 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:33:41,352 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:33:41,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:33:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 19:33:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:33:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 19:33:41,359 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 19:33:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:41,360 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 19:33:41,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:33:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 19:33:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 19:33:41,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:41,361 INFO L523 BasicCegarLoop]: trace histogram [3, 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 19:33:41,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 19:33:41,565 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:41,565 INFO L82 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2021-05-02 19:33:41,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:41,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746093954] [2021-05-02 19:33:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:41,572 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:41,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346569929] [2021-05-02 19:33:41,572 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 19:33:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:41,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:33:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:33:41,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:41,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746093954] [2021-05-02 19:33:41,723 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:41,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346569929] [2021-05-02 19:33:41,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346569929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:41,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:41,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:33:41,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404096110] [2021-05-02 19:33:41,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:33:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:41,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:33:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:33:41,725 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:33:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:41,896 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-05-02 19:33:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:33:41,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 19:33:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:41,898 INFO L225 Difference]: With dead ends: 60 [2021-05-02 19:33:41,898 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 19:33:41,898 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 19:33:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 19:33:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:33:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2021-05-02 19:33:41,904 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 27 [2021-05-02 19:33:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:41,904 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2021-05-02 19:33:41,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:33:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2021-05-02 19:33:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:33:41,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:41,905 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 19:33:42,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:42,121 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:42,122 INFO L82 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2021-05-02 19:33:42,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:42,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574831528] [2021-05-02 19:33:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:42,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:42,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924470716] [2021-05-02 19:33:42,128 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 19:33:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:42,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:33:42,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:33:42,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:42,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574831528] [2021-05-02 19:33:42,259 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:42,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924470716] [2021-05-02 19:33:42,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924470716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:42,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:42,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:33:42,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923825818] [2021-05-02 19:33:42,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:33:42,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:33:42,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:33:42,260 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:33:42,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:42,421 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-05-02 19:33:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:33:42,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-05-02 19:33:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:42,423 INFO L225 Difference]: With dead ends: 64 [2021-05-02 19:33:42,423 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 19:33:42,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 19:33:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 19:33:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 19:33:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-05-02 19:33:42,428 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 32 [2021-05-02 19:33:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:42,428 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-05-02 19:33:42,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:33:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-05-02 19:33:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 19:33:42,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:42,430 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:42,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:42,637 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2021-05-02 19:33:42,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:42,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802017705] [2021-05-02 19:33:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:42,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:42,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298884374] [2021-05-02 19:33:42,646 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 19:33:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:42,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:33:42,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:33:42,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:42,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802017705] [2021-05-02 19:33:42,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:42,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298884374] [2021-05-02 19:33:42,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298884374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:42,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:42,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:33:42,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698773752] [2021-05-02 19:33:42,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:33:42,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:42,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:33:42,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:33:42,843 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 19:33:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:43,047 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2021-05-02 19:33:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:33:43,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-02 19:33:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:43,048 INFO L225 Difference]: With dead ends: 79 [2021-05-02 19:33:43,048 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 19:33:43,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:33:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 19:33:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-02 19:33:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:33:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-05-02 19:33:43,055 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 49 [2021-05-02 19:33:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:43,055 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-05-02 19:33:43,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 19:33:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-05-02 19:33:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 19:33:43,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:43,056 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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 19:33:43,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:43,265 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2021-05-02 19:33:43,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:43,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631480518] [2021-05-02 19:33:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:43,272 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:43,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972722810] [2021-05-02 19:33:43,272 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 19:33:43,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:33:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:33:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:33:43,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:43,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631480518] [2021-05-02 19:33:43,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:43,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972722810] [2021-05-02 19:33:43,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972722810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:43,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:43,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:33:43,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031042148] [2021-05-02 19:33:43,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:33:43,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:43,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:33:43,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:33:43,437 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:33:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:43,624 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-05-02 19:33:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:33:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 54 [2021-05-02 19:33:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:43,626 INFO L225 Difference]: With dead ends: 83 [2021-05-02 19:33:43,626 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 19:33:43,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:33:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 19:33:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 19:33:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 43 states have internal predecessors, (44), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 19:33:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-05-02 19:33:43,631 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 54 [2021-05-02 19:33:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:43,632 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-05-02 19:33:43,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:33:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-05-02 19:33:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 19:33:43,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:43,633 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:43,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 19:33:43,849 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2021-05-02 19:33:43,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:43,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615229098] [2021-05-02 19:33:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:43,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:43,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837101228] [2021-05-02 19:33:43,856 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 19:33:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:43,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 19:33:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:43,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:43,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:43,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:43,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:43,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:43,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:43,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-02 19:33:44,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:44,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615229098] [2021-05-02 19:33:44,170 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:44,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837101228] [2021-05-02 19:33:44,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837101228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:44,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:44,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:33:44,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126275457] [2021-05-02 19:33:44,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:33:44,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:33:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:44,172 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:33:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:44,328 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2021-05-02 19:33:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:33:44,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2021-05-02 19:33:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:44,330 INFO L225 Difference]: With dead ends: 89 [2021-05-02 19:33:44,330 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 19:33:44,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:33:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 19:33:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 19:33:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 19:33:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-02 19:33:44,337 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 75 [2021-05-02 19:33:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:44,337 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-02 19:33:44,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:33:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-02 19:33:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 19:33:44,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:44,338 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:44,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:44,539 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2023420382, now seen corresponding path program 3 times [2021-05-02 19:33:44,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:44,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508465125] [2021-05-02 19:33:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:44,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:44,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139383850] [2021-05-02 19:33:44,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:44,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:33:44,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:44,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:33:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:44,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:33:44,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508465125] [2021-05-02 19:33:44,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139383850] [2021-05-02 19:33:44,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139383850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:44,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:44,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:33:44,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251971804] [2021-05-02 19:33:44,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:33:44,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:44,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:33:44,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:44,780 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:33:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:45,012 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2021-05-02 19:33:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:33:45,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2021-05-02 19:33:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:45,013 INFO L225 Difference]: With dead ends: 110 [2021-05-02 19:33:45,013 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 19:33:45,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:33:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 19:33:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 19:33:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:33:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-05-02 19:33:45,019 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 76 [2021-05-02 19:33:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:45,019 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-05-02 19:33:45,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:33:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-05-02 19:33:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 19:33:45,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:45,020 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:45,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:33:45,238 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2021-05-02 19:33:45,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:45,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743732449] [2021-05-02 19:33:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:45,243 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:45,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809983869] [2021-05-02 19:33:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:45,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 19:33:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 19:33:45,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:45,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743732449] [2021-05-02 19:33:45,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:45,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809983869] [2021-05-02 19:33:45,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809983869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:45,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:45,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:33:45,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082877682] [2021-05-02 19:33:45,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:33:45,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:33:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:45,544 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:33:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:45,699 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2021-05-02 19:33:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:33:45,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2021-05-02 19:33:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:45,702 INFO L225 Difference]: With dead ends: 113 [2021-05-02 19:33:45,702 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 19:33:45,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:33:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 19:33:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 19:33:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 61 states have internal predecessors, (62), 38 states have call successors, (38), 17 states have call predecessors, (38), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:33:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-05-02 19:33:45,707 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 80 [2021-05-02 19:33:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:45,707 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-05-02 19:33:45,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:33:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-05-02 19:33:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 19:33:45,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:45,708 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:45,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 19:33:45,919 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2021-05-02 19:33:45,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:45,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5394566] [2021-05-02 19:33:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:45,932 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:45,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109761422] [2021-05-02 19:33:45,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:45,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:33:45,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:45,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:33:45,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 38 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 19:33:46,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:46,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5394566] [2021-05-02 19:33:46,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:46,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109761422] [2021-05-02 19:33:46,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109761422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:46,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:46,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:33:46,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764698417] [2021-05-02 19:33:46,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:33:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:33:46,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:46,203 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 19:33:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:46,503 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-05-02 19:33:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:33:46,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2021-05-02 19:33:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:46,505 INFO L225 Difference]: With dead ends: 118 [2021-05-02 19:33:46,505 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 19:33:46,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:33:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 19:33:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 19:33:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 34 states have call successors, (34), 16 states have call predecessors, (34), 15 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 19:33:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2021-05-02 19:33:46,524 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 81 [2021-05-02 19:33:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:46,524 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2021-05-02 19:33:46,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 19:33:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2021-05-02 19:33:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 19:33:46,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:46,525 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:46,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:46,741 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:46,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1552787842, now seen corresponding path program 5 times [2021-05-02 19:33:46,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:46,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147596432] [2021-05-02 19:33:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:46,747 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:46,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677698959] [2021-05-02 19:33:46,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:46,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 19:33:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:46,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 19:33:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 83 proven. 50 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 19:33:46,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:46,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147596432] [2021-05-02 19:33:46,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:46,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677698959] [2021-05-02 19:33:46,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677698959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:46,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:46,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:33:46,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229506405] [2021-05-02 19:33:46,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:33:46,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:46,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:33:46,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:46,998 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 19:33:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:47,254 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2021-05-02 19:33:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:33:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 86 [2021-05-02 19:33:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:47,257 INFO L225 Difference]: With dead ends: 110 [2021-05-02 19:33:47,257 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 19:33:47,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:33:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 19:33:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-05-02 19:33:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 60 states have internal predecessors, (61), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 19:33:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-05-02 19:33:47,267 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 86 [2021-05-02 19:33:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:47,268 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-05-02 19:33:47,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 19:33:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-05-02 19:33:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 19:33:47,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:47,276 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:47,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:47,485 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2021-05-02 19:33:47,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:47,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425693778] [2021-05-02 19:33:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:47,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:47,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143229398] [2021-05-02 19:33:47,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:47,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:33:47,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:33:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:47,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 46 proven. 52 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-02 19:33:47,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:47,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425693778] [2021-05-02 19:33:47,839 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:47,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143229398] [2021-05-02 19:33:47,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143229398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:47,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:47,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:33:47,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381829339] [2021-05-02 19:33:47,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:33:47,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:47,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:33:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:33:47,842 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-05-02 19:33:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:48,101 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2021-05-02 19:33:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:33:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2021-05-02 19:33:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:48,102 INFO L225 Difference]: With dead ends: 111 [2021-05-02 19:33:48,102 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 19:33:48,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:33:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 19:33:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 19:33:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 19:33:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-02 19:33:48,105 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 102 [2021-05-02 19:33:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:48,106 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-02 19:33:48,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-05-02 19:33:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-02 19:33:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 19:33:48,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:48,107 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:48,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 19:33:48,307 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1591187207, now seen corresponding path program 6 times [2021-05-02 19:33:48,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:48,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777429] [2021-05-02 19:33:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:48,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:48,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039958335] [2021-05-02 19:33:48,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:48,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 19:33:48,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:48,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:33:48,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:48,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-05-02 19:33:48,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:48,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777429] [2021-05-02 19:33:48,633 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:48,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039958335] [2021-05-02 19:33:48,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039958335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:48,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:48,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:33:48,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730427033] [2021-05-02 19:33:48,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:33:48,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:48,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:33:48,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:33:48,634 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 19:33:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:56,986 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2021-05-02 19:33:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:33:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-05-02 19:33:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:56,987 INFO L225 Difference]: With dead ends: 115 [2021-05-02 19:33:56,987 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 19:33:56,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:33:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 19:33:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 19:33:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 19:33:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-02 19:33:56,990 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 103 [2021-05-02 19:33:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:56,990 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-02 19:33:56,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 19:33:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-02 19:33:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 19:33:56,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:56,991 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:57,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:33:57,205 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2021-05-02 19:33:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:57,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431990040] [2021-05-02 19:33:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:57,210 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:57,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438664408] [2021-05-02 19:33:57,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:57,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:33:57,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:33:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:57,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 48 proven. 55 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 19:33:57,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:57,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431990040] [2021-05-02 19:33:57,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:57,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438664408] [2021-05-02 19:33:57,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438664408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:57,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:57,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:33:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317209825] [2021-05-02 19:33:57,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:33:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:33:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:33:57,512 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-05-02 19:33:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:57,772 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-05-02 19:33:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:33:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 107 [2021-05-02 19:33:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:57,773 INFO L225 Difference]: With dead ends: 123 [2021-05-02 19:33:57,773 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 19:33:57,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:33:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 19:33:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 19:33:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 29 states have call successors, (29), 19 states have call predecessors, (29), 18 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:33:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-05-02 19:33:57,780 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 107 [2021-05-02 19:33:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:57,780 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-05-02 19:33:57,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-05-02 19:33:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-05-02 19:33:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 19:33:57,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:57,781 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:57,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 19:33:57,997 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:57,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1186188245, now seen corresponding path program 7 times [2021-05-02 19:33:57,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:57,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398780598] [2021-05-02 19:33:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:58,003 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:58,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230191193] [2021-05-02 19:33:58,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:58,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:33:58,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:58,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-05-02 19:33:58,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:58,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398780598] [2021-05-02 19:33:58,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:58,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230191193] [2021-05-02 19:33:58,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230191193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:33:58,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:33:58,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:33:58,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424477250] [2021-05-02 19:33:58,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:33:58,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:58,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:33:58,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:33:58,230 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 19:33:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:58,267 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-05-02 19:33:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:33:58,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2021-05-02 19:33:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:58,269 INFO L225 Difference]: With dead ends: 85 [2021-05-02 19:33:58,269 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:33:58,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:33:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:33:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:33:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:33:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:33:58,269 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2021-05-02 19:33:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:58,269 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:33:58,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 19:33:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:33:58,270 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:33:58,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:58,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:33:58 BasicIcfg [2021-05-02 19:33:58,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:33:58,489 INFO L168 Benchmark]: Toolchain (without parser) took 19194.37 ms. Allocated memory was 226.5 MB in the beginning and 327.2 MB in the end (delta: 100.7 MB). Free memory was 192.4 MB in the beginning and 189.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 103.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:33:58,489 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 226.5 MB. Free memory is still 208.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:33:58,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.19 ms. Allocated memory is still 226.5 MB. Free memory was 192.1 MB in the beginning and 210.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:33:58,489 INFO L168 Benchmark]: Boogie Preprocessor took 35.18 ms. Allocated memory is still 226.5 MB. Free memory was 210.3 MB in the beginning and 208.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:33:58,489 INFO L168 Benchmark]: RCFGBuilder took 290.11 ms. Allocated memory is still 226.5 MB. Free memory was 208.7 MB in the beginning and 193.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:33:58,490 INFO L168 Benchmark]: IcfgTransformer took 16.11 ms. Allocated memory is still 226.5 MB. Free memory was 193.0 MB in the beginning and 191.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:33:58,490 INFO L168 Benchmark]: TraceAbstraction took 18607.01 ms. Allocated memory was 226.5 MB in the beginning and 327.2 MB in the end (delta: 100.7 MB). Free memory was 191.4 MB in the beginning and 189.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 102.3 MB. Max. memory is 8.0 GB. [2021-05-02 19:33:58,490 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 226.5 MB. Free memory is still 208.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.19 ms. Allocated memory is still 226.5 MB. Free memory was 192.1 MB in the beginning and 210.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.18 ms. Allocated memory is still 226.5 MB. Free memory was 210.3 MB in the beginning and 208.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 290.11 ms. Allocated memory is still 226.5 MB. Free memory was 208.7 MB in the beginning and 193.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.11 ms. Allocated memory is still 226.5 MB. Free memory was 193.0 MB in the beginning and 191.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18607.01 ms. Allocated memory was 226.5 MB in the beginning and 327.2 MB in the end (delta: 100.7 MB). Free memory was 191.4 MB in the beginning and 189.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 102.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18551.7ms, OverallIterations: 16, TraceHistogramMax: 18, EmptinessCheckTime: 37.1ms, AutomataDifference: 11455.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 242 SDslu, 2533 SDs, 0 SdLazy, 3327 SolverSat, 345 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 10203.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1044 GetRequests, 889 SyntacticMatches, 4 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1275.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=14, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 104.8ms AutomataMinimizationTime, 16 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 127.8ms SsaConstructionTime, 402.9ms SatisfiabilityAnalysisTime, 2947.9ms InterpolantComputationTime, 1036 NumberOfCodeBlocks, 945 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1020 ConstructedInterpolants, 0 QuantifiedInterpolants, 3774 SizeOfPredicates, 50 NumberOfNonLiveVariables, 2726 ConjunctsInSsa, 364 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 3702/3947 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...