/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/divbin2_valuebound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:06:37,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:06:37,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:06:37,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:06:37,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:06:37,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:06:37,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:06:37,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:06:37,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:06:37,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:06:37,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:06:37,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:06:37,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:06:37,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:06:37,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:06:37,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:06:37,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:06:37,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:06:37,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:06:37,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:06:37,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:06:37,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:06:37,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:06:37,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:06:37,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:06:37,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:06:37,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:06:37,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:06:37,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:06:37,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:06:37,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:06:37,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:06:37,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:06:37,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:06:37,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:06:37,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:06:37,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:06:37,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:06:37,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:06:37,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:06:37,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:06:37,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:06:37,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:06:37,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:06:37,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:06:37,179 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:06:37,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:06:37,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:06:37,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:06:37,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:06:37,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:06:37,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:06:37,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:06:37,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:06:37,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:06:37,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:06:37,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:06:37,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:06:37,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:06:37,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:06:37,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:06:37,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:06:37,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:06:37,183 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:06:37,183 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:06:37,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:06:37,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:06:37,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:06:37,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:06:37,514 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:06:37,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i [2021-05-02 20:06:37,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf7ab3657/a459ab5cbec94a23b28609e0ff06bba9/FLAG9cca3c4e6 [2021-05-02 20:06:38,049 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:06:38,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i [2021-05-02 20:06:38,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf7ab3657/a459ab5cbec94a23b28609e0ff06bba9/FLAG9cca3c4e6 [2021-05-02 20:06:38,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf7ab3657/a459ab5cbec94a23b28609e0ff06bba9 [2021-05-02 20:06:38,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:06:38,085 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:06:38,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:06:38,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:06:38,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:06:38,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258d9213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38, skipping insertion in model container [2021-05-02 20:06:38,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:06:38,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:06:38,274 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/divbin2_valuebound2.i[959,972] [2021-05-02 20:06:38,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:06:38,298 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:06:38,314 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/divbin2_valuebound2.i[959,972] [2021-05-02 20:06:38,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:06:38,341 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:06:38,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38 WrapperNode [2021-05-02 20:06:38,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:06:38,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:06:38,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:06:38,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:06:38,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:06:38,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:06:38,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:06:38,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:06:38,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:06:38,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:06:38,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:06:38,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:06:38,508 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:06:38,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:06:38,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:06:38,508 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:06:38,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:06:38,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:06:38,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:06:38,509 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:06:38,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:06:38,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:06:38,509 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:06:38,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:06:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:06:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:06:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:06:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:06:38,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:06:38,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:06:38,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:06:38,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:06:38,845 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:06:38,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:06:38 BoogieIcfgContainer [2021-05-02 20:06:38,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:06:38,847 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:06:38,848 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:06:38,848 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:06:38,850 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:06:38" (1/1) ... [2021-05-02 20:06:38,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:06:38 BasicIcfg [2021-05-02 20:06:38,866 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:06:38,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:06:38,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:06:38,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:06:38,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:06:38" (1/4) ... [2021-05-02 20:06:38,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bc0f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:06:38, skipping insertion in model container [2021-05-02 20:06:38,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:38" (2/4) ... [2021-05-02 20:06:38,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bc0f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:06:38, skipping insertion in model container [2021-05-02 20:06:38,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:06:38" (3/4) ... [2021-05-02 20:06:38,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bc0f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:06:38, skipping insertion in model container [2021-05-02 20:06:38,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:06:38" (4/4) ... [2021-05-02 20:06:38,873 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound2.iJordan [2021-05-02 20:06:38,878 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:06:38,882 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:06:38,896 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:06:38,912 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:06:38,912 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:06:38,913 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:06:38,913 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:06:38,913 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:06:38,913 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:06:38,913 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:06:38,913 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:06:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:06:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:06:38,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:38,930 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:38,930 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash 483266332, now seen corresponding path program 1 times [2021-05-02 20:06:38,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:38,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109189233] [2021-05-02 20:06:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:39,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:06:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:39,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:06:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:39,172 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 20:06:39,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:39,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109189233] [2021-05-02 20:06:39,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109189233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:06:39,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:06:39,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:06:39,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501060746] [2021-05-02 20:06:39,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:06:39,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:39,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:06:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:06:39,195 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 20:06:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:39,253 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 20:06:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:06:39,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2021-05-02 20:06:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:39,261 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:06:39,261 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:06:39,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:06:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:06:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:06:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-05-02 20:06:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 20:06:39,293 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 20:06:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:39,294 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 20:06:39,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 20:06:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 20:06:39,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 20:06:39,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:39,296 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:39,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:06:39,297 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2138426952, now seen corresponding path program 1 times [2021-05-02 20:06:39,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:39,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907390466] [2021-05-02 20:06:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:39,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:39,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072098376] [2021-05-02 20:06:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:06:39,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:39,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:39,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:39,696 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 20:06:39,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:39,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907390466] [2021-05-02 20:06:39,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:39,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072098376] [2021-05-02 20:06:39,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072098376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:06:39,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:06:39,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:06:39,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219719827] [2021-05-02 20:06:39,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:06:39,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:06:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:06:39,700 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 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 20:06:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:39,794 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 20:06:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:06:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 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 19 [2021-05-02 20:06:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:39,795 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:06:39,796 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:06:39,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:06:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:06:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:06:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-05-02 20:06:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 20:06:39,802 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 20:06:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:39,802 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 20:06:39,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 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 20:06:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 20:06:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 20:06:39,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:39,803 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] [2021-05-02 20:06:40,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:06:40,004 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:40,005 INFO L82 PathProgramCache]: Analyzing trace with hash -554838191, now seen corresponding path program 1 times [2021-05-02 20:06:40,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:40,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922824906] [2021-05-02 20:06:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:40,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:40,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907249137] [2021-05-02 20:06:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:06:40,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:40,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:40,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:06:40,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:40,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922824906] [2021-05-02 20:06:40,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:40,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907249137] [2021-05-02 20:06:40,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907249137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:40,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:40,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:06:40,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127141947] [2021-05-02 20:06:40,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:06:40,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:06:40,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:06:40,294 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 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 20:06:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:40,408 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-02 20:06:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:06:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 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 21 [2021-05-02 20:06:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:40,411 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:06:40,412 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:06:40,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:06:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:06:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:06:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 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) [2021-05-02 20:06:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 20:06:40,426 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 20:06:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:40,426 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 20:06:40,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 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 20:06:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 20:06:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 20:06:40,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:40,428 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:40,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:40,641 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:40,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1600606598, now seen corresponding path program 1 times [2021-05-02 20:06:40,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:40,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122127098] [2021-05-02 20:06:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:40,651 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:40,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238162700] [2021-05-02 20:06:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:40,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:06:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:06:40,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:40,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122127098] [2021-05-02 20:06:40,804 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:40,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238162700] [2021-05-02 20:06:40,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238162700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:06:40,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:06:40,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:06:40,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540086586] [2021-05-02 20:06:40,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:06:40,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:06:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:06:40,806 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:40,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:40,819 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 20:06:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:06:40,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 20:06:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:40,821 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:06:40,821 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:06:40,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:06:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:06:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:06:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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) [2021-05-02 20:06:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 20:06:40,825 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 20:06:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:40,825 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 20:06:40,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 20:06:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:06:40,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:40,826 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:41,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:41,053 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:41,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1664896543, now seen corresponding path program 1 times [2021-05-02 20:06:41,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:41,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213740525] [2021-05-02 20:06:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:41,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:41,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509841651] [2021-05-02 20:06:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:41,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:06:41,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:41,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:41,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:41,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:06:41,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:41,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213740525] [2021-05-02 20:06:41,403 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:41,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509841651] [2021-05-02 20:06:41,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509841651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:41,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:41,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:06:41,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161012331] [2021-05-02 20:06:41,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:06:41,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:41,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:06:41,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:06:41,405 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:41,557 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-02 20:06:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:06:41,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:06:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:41,560 INFO L225 Difference]: With dead ends: 53 [2021-05-02 20:06:41,560 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 20:06:41,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:06:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 20:06:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 20:06:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:06:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-05-02 20:06:41,566 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 29 [2021-05-02 20:06:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:41,566 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-05-02 20:06:41,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-05-02 20:06:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:06:41,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:41,567 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:41,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:41,791 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash -976975752, now seen corresponding path program 2 times [2021-05-02 20:06:41,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:41,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518217840] [2021-05-02 20:06:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:41,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:41,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952735433] [2021-05-02 20:06:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:41,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:06:41,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:06:41,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:06:41,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:41,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:41,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:06:42,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:42,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518217840] [2021-05-02 20:06:42,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:42,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952735433] [2021-05-02 20:06:42,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952735433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:42,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:42,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:06:42,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487987882] [2021-05-02 20:06:42,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:06:42,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:06:42,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:06:42,174 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:42,391 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-05-02 20:06:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:06:42,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 20:06:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:42,396 INFO L225 Difference]: With dead ends: 75 [2021-05-02 20:06:42,396 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 20:06:42,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:06:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 20:06:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-05-02 20:06:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:06:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-05-02 20:06:42,417 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 31 [2021-05-02 20:06:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:42,417 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-05-02 20:06:42,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-05-02 20:06:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:06:42,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:42,419 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:42,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:06:42,625 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1815734547, now seen corresponding path program 3 times [2021-05-02 20:06:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:42,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097947358] [2021-05-02 20:06:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:42,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:42,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611179318] [2021-05-02 20:06:42,633 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:45,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:06:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:06:45,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:06:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:45,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:45,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:45,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:45,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:06:45,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097947358] [2021-05-02 20:06:45,540 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611179318] [2021-05-02 20:06:45,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611179318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:45,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:45,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:06:45,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399793206] [2021-05-02 20:06:45,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:06:45,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:45,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:06:45,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:06:45,542 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:06:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:45,584 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-05-02 20:06:45,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:06:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 20:06:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:45,587 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:06:45,587 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:06:45,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:06:45,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:06:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:06:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:06:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-05-02 20:06:45,592 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 37 [2021-05-02 20:06:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:45,592 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-05-02 20:06:45,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:06:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-05-02 20:06:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:06:45,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:45,593 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:45,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:45,805 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:45,806 INFO L82 PathProgramCache]: Analyzing trace with hash -79763386, now seen corresponding path program 4 times [2021-05-02 20:06:45,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:45,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050224193] [2021-05-02 20:06:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:45,825 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:45,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615167584] [2021-05-02 20:06:45,826 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 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 20:06:46,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:06:46,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:06:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:06:46,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:46,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:46,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:46,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:46,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:47,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:47,446 WARN L159 QuantifierPusher]: Ignoring assumption.