/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/geo2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:28:38,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:28:38,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:28:38,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:28:38,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:28:38,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:28:38,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:28:38,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:28:38,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:28:38,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:28:38,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:28:38,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:28:38,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:28:38,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:28:38,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:28:38,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:28:38,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:28:38,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:28:38,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:28:38,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:28:38,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:28:38,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:28:38,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:28:38,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:28:38,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 08:28:38,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 08:28:38,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 08:28:38,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 08:28:38,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 08:28:38,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 08:28:38,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:28:38,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:28:38,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:28:38,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:28:38,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:28:38,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:28:38,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:28:38,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:28:38,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:28:38,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:28:38,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:28:38,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:28:38,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:28:38,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:28:38,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:28:38,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:28:38,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:28:38,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:28:38,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:28:38,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:28:38,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:28:38,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:28:38,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:28:38,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:28:38,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:28:38,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:28:38,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:28:38,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:28:38,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:28:38,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:28:38,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:28:38,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:28:38,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:28:38,403 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:28:38,403 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:28:38,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:28:38,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:28:38,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:28:38,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:28:38,718 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:28:38,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-05-06 08:28:38,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e20f4c28/c43bcd8c249640a3894f4335c63a51b1/FLAG679eb1698 [2021-05-06 08:28:39,107 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:28:39,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-05-06 08:28:39,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e20f4c28/c43bcd8c249640a3894f4335c63a51b1/FLAG679eb1698 [2021-05-06 08:28:39,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e20f4c28/c43bcd8c249640a3894f4335c63a51b1 [2021-05-06 08:28:39,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:28:39,538 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:28:39,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:28:39,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:28:39,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:28:39,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345aa6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39, skipping insertion in model container [2021-05-06 08:28:39,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:28:39,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:28:39,654 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/geo2-ll_unwindbound10.c[525,538] [2021-05-06 08:28:39,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:28:39,667 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:28:39,675 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/geo2-ll_unwindbound10.c[525,538] [2021-05-06 08:28:39,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:28:39,687 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:28:39,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39 WrapperNode [2021-05-06 08:28:39,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:28:39,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:28:39,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:28:39,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:28:39,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (1/1) ... [2021-05-06 08:28:39,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:28:39,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:28:39,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:28:39,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:28:39,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (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 [2021-05-06 08:28:39,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:28:39,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:28:39,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:28:39,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:28:39,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:28:39,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:28:39,828 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:28:39,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:28:39,828 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:28:39,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:28:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:28:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:28:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:28:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:28:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:28:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:28:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:28:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:28:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:28:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:28:40,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:28:40,033 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:28:40,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:40 BoogieIcfgContainer [2021-05-06 08:28:40,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:28:40,035 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:28:40,035 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:28:40,035 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:28:40,037 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:40" (1/1) ... [2021-05-06 08:28:40,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:28:40 BasicIcfg [2021-05-06 08:28:40,047 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:28:40,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:28:40,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:28:40,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:28:40,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:28:39" (1/4) ... [2021-05-06 08:28:40,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e0a23a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:28:40, skipping insertion in model container [2021-05-06 08:28:40,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:39" (2/4) ... [2021-05-06 08:28:40,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e0a23a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:28:40, skipping insertion in model container [2021-05-06 08:28:40,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:40" (3/4) ... [2021-05-06 08:28:40,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e0a23a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:28:40, skipping insertion in model container [2021-05-06 08:28:40,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:28:40" (4/4) ... [2021-05-06 08:28:40,052 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound10.cJordan [2021-05-06 08:28:40,056 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:28:40,059 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:28:40,069 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:28:40,088 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:28:40,088 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:28:40,088 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:28:40,088 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:28:40,088 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:28:40,088 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:28:40,088 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:28:40,088 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:28:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:28:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 08:28:40,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:40,116 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:40,117 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:40,123 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 08:28:40,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:40,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209151032] [2021-05-06 08:28:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:40,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:28:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:40,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:40,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209151032] [2021-05-06 08:28:40,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209151032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:40,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:40,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:28:40,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350335003] [2021-05-06 08:28:40,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:28:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:40,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:28:40,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:28:40,363 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:40,408 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 08:28:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:28:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 08:28:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:40,414 INFO L225 Difference]: With dead ends: 23 [2021-05-06 08:28:40,414 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 08:28:40,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:28:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 08:28:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 08:28:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 08:28:40,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 08:28:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:40,434 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 08:28:40,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:40,435 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 08:28:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:28:40,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:40,435 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:40,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:28:40,436 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 08:28:40,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:40,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70301359] [2021-05-06 08:28:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:40,446 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:40,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150509511] [2021-05-06 08:28:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:40,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:28:40,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:40,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:40,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70301359] [2021-05-06 08:28:40,606 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150509511] [2021-05-06 08:28:40,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150509511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:40,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:40,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:28:40,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123696224] [2021-05-06 08:28:40,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:28:40,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:40,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:28:40,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:28:40,609 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:40,620 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 08:28:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:28:40,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:28:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:40,622 INFO L225 Difference]: With dead ends: 19 [2021-05-06 08:28:40,622 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 08:28:40,622 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:28:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 08:28:40,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 08:28:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 08:28:40,630 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 08:28:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:40,631 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 08:28:40,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 08:28:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:28:40,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:40,637 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:40,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:28:40,853 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:40,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 08:28:40,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:40,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351613153] [2021-05-06 08:28:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:40,869 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:40,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759552661] [2021-05-06 08:28:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:40,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:28:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:40,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:41,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:41,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351613153] [2021-05-06 08:28:41,012 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:41,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759552661] [2021-05-06 08:28:41,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759552661] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:41,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:41,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:28:41,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077146866] [2021-05-06 08:28:41,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:28:41,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:41,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:28:41,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:28:41,014 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:41,041 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 08:28:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:28:41,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:28:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:41,043 INFO L225 Difference]: With dead ends: 26 [2021-05-06 08:28:41,043 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:28:41,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:41,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:28:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:28:41,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 08:28:41,046 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 08:28:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:41,046 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 08:28:41,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 08:28:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:28:41,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:41,047 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:41,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:41,261 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:41,261 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 08:28:41,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:41,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206329194] [2021-05-06 08:28:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:41,285 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:41,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028994533] [2021-05-06 08:28:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:41,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:28:41,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:41,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:41,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:41,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206329194] [2021-05-06 08:28:41,443 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:41,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028994533] [2021-05-06 08:28:41,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028994533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:41,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:41,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:28:41,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784567981] [2021-05-06 08:28:41,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:28:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:28:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:28:41,444 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:41,469 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 08:28:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:28:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:28:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:41,470 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:28:41,470 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:28:41,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:28:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:28:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 08:28:41,473 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 08:28:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:41,473 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 08:28:41,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 08:28:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:28:41,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:41,474 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:41,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:41,674 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:41,675 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 08:28:41,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:41,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601666127] [2021-05-06 08:28:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:41,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:41,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263817527] [2021-05-06 08:28:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:41,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:28:41,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:41,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:41,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:41,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601666127] [2021-05-06 08:28:41,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:41,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263817527] [2021-05-06 08:28:41,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263817527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:41,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:41,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:28:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640882972] [2021-05-06 08:28:41,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:28:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:28:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:41,786 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:41,826 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 08:28:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:28:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:28:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:41,828 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:28:41,828 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:28:41,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:28:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:28:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:28:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:28:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 08:28:41,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 08:28:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:41,840 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 08:28:41,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 08:28:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:28:41,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:41,841 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:42,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:42,049 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 08:28:42,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:42,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947279079] [2021-05-06 08:28:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:42,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:42,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454416610] [2021-05-06 08:28:42,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:42,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:28:42,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:28:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:42,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:42,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:42,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947279079] [2021-05-06 08:28:42,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:42,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454416610] [2021-05-06 08:28:42,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454416610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:42,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:42,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:28:42,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987531684] [2021-05-06 08:28:42,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:28:42,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:42,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:28:42,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:42,179 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:42,217 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-06 08:28:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:28:42,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:28:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:42,218 INFO L225 Difference]: With dead ends: 35 [2021-05-06 08:28:42,218 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:28:42,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:28:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:28:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:28:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:28:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 08:28:42,221 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 08:28:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:42,221 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 08:28:42,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 08:28:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:28:42,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:42,222 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:42,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:28:42,429 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-06 08:28:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:42,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721943487] [2021-05-06 08:28:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:42,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:42,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133650796] [2021-05-06 08:28:42,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:42,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:28:42,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:28:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:28:42,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:42,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721943487] [2021-05-06 08:28:42,933 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:42,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133650796] [2021-05-06 08:28:42,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133650796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:42,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:42,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:28:42,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137445218] [2021-05-06 08:28:42,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:28:42,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:28:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:28:42,935 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:29:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:29:08,553 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-06 08:29:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:29:08,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:29:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:29:08,554 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:29:08,555 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:29:08,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:29:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:29:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 08:29:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:29:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 08:29:08,557 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 08:29:08,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:29:08,557 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 08:29:08,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:29:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 08:29:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:29:08,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:29:08,558 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:29:08,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:29:08,773 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:29:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:29:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 08:29:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:29:08,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684308956] [2021-05-06 08:29:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:29:08,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:29:08,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492271552] [2021-05-06 08:29:08,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:29:08,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:29:08,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:29:08,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:29:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:29:13,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:29:13,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:29:13,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684308956] [2021-05-06 08:29:13,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:29:13,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492271552] [2021-05-06 08:29:13,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492271552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:29:13,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:29:13,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:29:13,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29970959] [2021-05-06 08:29:13,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:29:13,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:29:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:29:13,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:29:13,315 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)