/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:26:20,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:26:20,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:26:20,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:26:20,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:26:20,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:26:20,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:26:20,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:26:20,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:26:20,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:26:20,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:26:20,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:26:20,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:26:20,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:26:20,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:26:20,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:26:20,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:26:20,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:26:20,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:26:20,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:26:20,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:26:20,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:26:20,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:26:20,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:26:20,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:26:20,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:26:20,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:26:20,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:26:20,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:26:20,424 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:26:20,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:26:20,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:26:20,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:26:20,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:26:20,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:26:20,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:26:20,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:26:20,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:26:20,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:26:20,428 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:26:20,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:26:20,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:26:20,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:26:20,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:26:20,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:26:20,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:26:20,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:26:20,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:26:20,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:26:20,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:26:20,430 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:26:20,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:26:20,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:26:20,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:26:20,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:26:20,713 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:26:20,713 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:26:20,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-05-06 08:26:20,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36d86fa70/e143c97b99284f9db9c9506396168156/FLAG334cb9936 [2021-05-06 08:26:21,135 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:26:21,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-05-06 08:26:21,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36d86fa70/e143c97b99284f9db9c9506396168156/FLAG334cb9936 [2021-05-06 08:26:21,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36d86fa70/e143c97b99284f9db9c9506396168156 [2021-05-06 08:26:21,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:26:21,159 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:26:21,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:26:21,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:26:21,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:26:21,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707bfc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21, skipping insertion in model container [2021-05-06 08:26:21,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:26:21,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:26:21,294 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c[524,537] [2021-05-06 08:26:21,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:26:21,314 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:26:21,324 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c[524,537] [2021-05-06 08:26:21,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:26:21,354 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:26:21,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21 WrapperNode [2021-05-06 08:26:21,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:26:21,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:26:21,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:26:21,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:26:21,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:26:21,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:26:21,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:26:21,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:26:21,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (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 08:26:21,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:26:21,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:26:21,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:26:21,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:26:21,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:26:21,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:26:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:26:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:26:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:26:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:26:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:26:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:26:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:26:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:26:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:26:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:26:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:26:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:26:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:26:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:26:21,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:26:21,659 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:26:21,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:21 BoogieIcfgContainer [2021-05-06 08:26:21,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:26:21,660 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:26:21,660 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:26:21,661 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:26:21,662 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:21" (1/1) ... [2021-05-06 08:26:21,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:26:21 BasicIcfg [2021-05-06 08:26:21,672 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:26:21,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:26:21,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:26:21,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:26:21,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:26:21" (1/4) ... [2021-05-06 08:26:21,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424a2d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:26:21, skipping insertion in model container [2021-05-06 08:26:21,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:21" (2/4) ... [2021-05-06 08:26:21,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424a2d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:26:21, skipping insertion in model container [2021-05-06 08:26:21,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:21" (3/4) ... [2021-05-06 08:26:21,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424a2d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:26:21, skipping insertion in model container [2021-05-06 08:26:21,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:26:21" (4/4) ... [2021-05-06 08:26:21,676 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound20.cJordan [2021-05-06 08:26:21,692 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:26:21,695 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:26:21,715 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:26:21,741 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:26:21,741 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:26:21,741 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:26:21,741 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:26:21,741 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:26:21,741 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:26:21,741 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:26:21,742 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:26:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:26:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:26:21,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:21,759 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:21,759 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-06 08:26:21,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:21,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300027336] [2021-05-06 08:26:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:21,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:21,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398061833] [2021-05-06 08:26:21,842 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 08:26:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:21,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:26:21,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 08:26:21,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300027336] [2021-05-06 08:26:21,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:21,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398061833] [2021-05-06 08:26:21,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398061833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:21,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:21,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:26:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809041157] [2021-05-06 08:26:22,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:26:22,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:26:22,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:26:22,010 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:22,019 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-06 08:26:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:26:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:26:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:22,023 INFO L225 Difference]: With dead ends: 30 [2021-05-06 08:26:22,023 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:26:22,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:26:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:26:22,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:26:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 08:26:22,045 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 08:26:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:22,045 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 08:26:22,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 08:26:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:26:22,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:22,046 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:22,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:26:22,273 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:22,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-06 08:26:22,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:22,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757675691] [2021-05-06 08:26:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:22,291 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:22,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918692910] [2021-05-06 08:26:22,292 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 08:26:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:26:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:22,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:22,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:22,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:22,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:22,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:22,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:22,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757675691] [2021-05-06 08:26:22,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:22,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918692910] [2021-05-06 08:26:22,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918692910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:22,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:22,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:26:22,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082935217] [2021-05-06 08:26:22,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:26:22,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:22,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:26:22,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:26:22,487 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:22,503 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-06 08:26:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:26:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:26:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:22,507 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:26:22,507 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:26:22,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:26:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:26:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:26:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 08:26:22,514 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 08:26:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:22,518 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 08:26:22,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 08:26:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:26:22,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:22,519 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:22,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:22,729 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:22,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-06 08:26:22,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:22,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694201557] [2021-05-06 08:26:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:22,740 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:22,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897525431] [2021-05-06 08:26:22,740 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 08:26:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:22,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:26:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:22,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:22,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:22,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:22,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:22,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694201557] [2021-05-06 08:26:22,928 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:22,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897525431] [2021-05-06 08:26:22,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897525431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:22,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:22,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:26:22,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342305380] [2021-05-06 08:26:22,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:26:22,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:26:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:26:22,929 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:26:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:25,531 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-06 08:26:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:26:25,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:26:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:25,532 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:26:25,533 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:26:25,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:26:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:26:25,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-06 08:26:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:26:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-06 08:26:25,537 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2021-05-06 08:26:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:25,538 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-06 08:26:25,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:26:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-06 08:26:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:26:25,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:25,539 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:25,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:25,753 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:25,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-06 08:26:25,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:25,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648432903] [2021-05-06 08:26:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:25,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:25,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577808292] [2021-05-06 08:26:25,765 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 08:26:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:25,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:26:25,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:25,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:25,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:25,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:26,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:26,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648432903] [2021-05-06 08:26:26,004 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:26,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577808292] [2021-05-06 08:26:26,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577808292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:26,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:26,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:26:26,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010726384] [2021-05-06 08:26:26,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:26:26,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:26,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:26:26,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:26,006 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:26:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:26,085 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-06 08:26:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:26:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 08:26:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:26,089 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:26:26,089 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:26:26,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:26:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:26:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-05-06 08:26:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 08:26:26,098 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 08:26:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:26,099 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 08:26:26,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:26:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 08:26:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:26:26,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:26,101 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:26,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:26,319 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:26,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-06 08:26:26,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:26,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622903482] [2021-05-06 08:26:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:26,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:26,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428581902] [2021-05-06 08:26:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:26:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:26,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:26,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:26,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622903482] [2021-05-06 08:26:26,492 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:26,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428581902] [2021-05-06 08:26:26,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428581902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:26,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:26,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:26:26,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459251728] [2021-05-06 08:26:26,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:26:26,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:26,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:26:26,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:26:26,493 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:26:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:26,530 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-06 08:26:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:26:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 08:26:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:26,533 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:26:26,533 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:26:26,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:26:26,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:26:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:26:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:26:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 08:26:26,543 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 08:26:26,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:26,544 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 08:26:26,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:26:26,544 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 08:26:26,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:26:26,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:26,546 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:26,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:26,747 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:26,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-06 08:26:26,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:26,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585787548] [2021-05-06 08:26:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:26,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:26,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249607395] [2021-05-06 08:26:26,755 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 08:26:26,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:26:26,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:26,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:26:26,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:26,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:26,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:26,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585787548] [2021-05-06 08:26:26,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:26,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249607395] [2021-05-06 08:26:26,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249607395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:26,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:26,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:26:26,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756051277] [2021-05-06 08:26:26,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:26:26,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:26,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:26:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:26:26,910 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:26:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:26,953 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 08:26:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:26:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 08:26:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:26,955 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:26:26,955 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:26:26,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:26:26,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 08:26:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:26:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 08:26:26,958 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 08:26:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:26,958 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 08:26:26,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:26:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 08:26:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:26:26,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:26,959 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:27,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:27,173 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-06 08:26:27,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:27,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605142262] [2021-05-06 08:26:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:27,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:27,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372209050] [2021-05-06 08:26:27,181 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 08:26:27,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:26:27,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:27,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:26:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:27,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:27,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:27,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605142262] [2021-05-06 08:26:27,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:27,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372209050] [2021-05-06 08:26:27,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372209050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:27,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:27,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:26:27,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802973485] [2021-05-06 08:26:27,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:26:27,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:26:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:26:27,434 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:26:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:27,503 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-05-06 08:26:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:26:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 08:26:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:27,505 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:26:27,505 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:26:27,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:26:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:26:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:26:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:26:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 08:26:27,519 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 08:26:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:27,520 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 08:26:27,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:26:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 08:26:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:26:27,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:27,524 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:27,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:27,737 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:27,737 INFO L82 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 4 times [2021-05-06 08:26:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:27,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005461054] [2021-05-06 08:26:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:27,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:27,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848436570] [2021-05-06 08:26:27,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:27,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:26:27,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:26:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:27,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:27,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:27,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005461054] [2021-05-06 08:26:27,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:27,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848436570] [2021-05-06 08:26:27,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848436570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:27,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:27,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:26:27,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064269882] [2021-05-06 08:26:27,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:26:27,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:27,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:26:27,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:27,984 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:26:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:28,065 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-06 08:26:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:26:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 08:26:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:28,066 INFO L225 Difference]: With dead ends: 65 [2021-05-06 08:26:28,066 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:26:28,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:26:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:26:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:26:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:26:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 08:26:28,069 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 08:26:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:28,070 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 08:26:28,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:26:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 08:26:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:26:28,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:28,070 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:28,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:26:28,273 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1572135395, now seen corresponding path program 5 times [2021-05-06 08:26:28,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:28,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879838858] [2021-05-06 08:26:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:28,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:28,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152410110] [2021-05-06 08:26:28,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:28,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:26:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:26:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:28,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:28,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:28,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879838858] [2021-05-06 08:26:28,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:28,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152410110] [2021-05-06 08:26:28,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152410110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:28,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:28,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:26:28,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457149119] [2021-05-06 08:26:28,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:26:28,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:28,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:26:28,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:26:28,511 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:26:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:28,620 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-05-06 08:26:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:26:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-06 08:26:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:28,621 INFO L225 Difference]: With dead ends: 74 [2021-05-06 08:26:28,621 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 08:26:28,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:26:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 08:26:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 08:26:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:26:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-06 08:26:28,624 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-06 08:26:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:28,624 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-06 08:26:28,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:26:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-06 08:26:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:26:28,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:28,625 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:28,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:28,826 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1651262200, now seen corresponding path program 6 times [2021-05-06 08:26:28,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:28,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677116896] [2021-05-06 08:26:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:28,837 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:28,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744567728] [2021-05-06 08:26:28,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:29,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:26:29,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:26:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:29,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:29,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:29,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677116896] [2021-05-06 08:26:29,227 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:29,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744567728] [2021-05-06 08:26:29,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744567728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:29,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:29,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:26:29,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792504632] [2021-05-06 08:26:29,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:26:29,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:26:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:26:29,228 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:26:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:29,317 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-05-06 08:26:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:26:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-06 08:26:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:29,318 INFO L225 Difference]: With dead ends: 83 [2021-05-06 08:26:29,318 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 08:26:29,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:26:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 08:26:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 08:26:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:26:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-06 08:26:29,321 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-06 08:26:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:29,322 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-06 08:26:29,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:26:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-06 08:26:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:26:29,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:29,322 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:29,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:29,537 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:29,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1720170109, now seen corresponding path program 7 times [2021-05-06 08:26:29,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:29,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226752676] [2021-05-06 08:26:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:29,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:29,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776560366] [2021-05-06 08:26:29,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:29,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:26:29,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:29,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:29,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:29,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226752676] [2021-05-06 08:26:29,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:29,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776560366] [2021-05-06 08:26:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776560366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:29,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:29,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:26:29,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370337509] [2021-05-06 08:26:29,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:26:29,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:29,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:26:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:26:29,799 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:26:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:29,920 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-06 08:26:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:26:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-06 08:26:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:29,921 INFO L225 Difference]: With dead ends: 92 [2021-05-06 08:26:29,921 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 08:26:29,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:26:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 08:26:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 08:26:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:26:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 08:26:29,932 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-06 08:26:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:29,932 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 08:26:29,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:26:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 08:26:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 08:26:29,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:29,934 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:30,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:26:30,145 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash -327979176, now seen corresponding path program 8 times [2021-05-06 08:26:30,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:30,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347248974] [2021-05-06 08:26:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:30,152 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:30,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011305046] [2021-05-06 08:26:30,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:30,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:26:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:26:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:30,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:30,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:30,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347248974] [2021-05-06 08:26:30,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:30,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011305046] [2021-05-06 08:26:30,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011305046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:30,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:30,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:26:30,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569531852] [2021-05-06 08:26:30,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:26:30,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:26:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:26:30,426 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:26:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:30,563 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-05-06 08:26:30,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:26:30,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-06 08:26:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:30,564 INFO L225 Difference]: With dead ends: 101 [2021-05-06 08:26:30,564 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 08:26:30,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:26:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 08:26:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 08:26:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:26:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 08:26:30,567 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-06 08:26:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:30,567 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 08:26:30,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:26:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 08:26:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:26:30,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:30,568 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:30,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:30,769 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1572009693, now seen corresponding path program 9 times [2021-05-06 08:26:30,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:30,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014514521] [2021-05-06 08:26:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:30,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:30,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023199855] [2021-05-06 08:26:30,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:05,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 08:27:05,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:27:05,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:05,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:05,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014514521] [2021-05-06 08:27:05,505 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023199855] [2021-05-06 08:27:05,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023199855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:05,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:05,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:27:05,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882288704] [2021-05-06 08:27:05,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:27:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:27:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:27:05,508 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:27:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:05,645 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-05-06 08:27:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:27:05,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-06 08:27:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:05,646 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:27:05,646 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:27:05,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:27:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:27:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-06 08:27:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:27:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-06 08:27:05,651 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-06 08:27:05,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:05,651 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-06 08:27:05,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:27:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-06 08:27:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:27:05,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:05,653 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:05,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:27:05,869 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:05,869 INFO L82 PathProgramCache]: Analyzing trace with hash 191644600, now seen corresponding path program 10 times [2021-05-06 08:27:05,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:05,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125401757] [2021-05-06 08:27:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:05,877 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:05,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124638864] [2021-05-06 08:27:05,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:06,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:27:06,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:27:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:06,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:06,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:06,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125401757] [2021-05-06 08:27:06,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:06,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124638864] [2021-05-06 08:27:06,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124638864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:06,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:06,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:27:06,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421201716] [2021-05-06 08:27:06,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:27:06,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:06,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:27:06,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:27:06,256 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 08:27:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:06,411 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-05-06 08:27:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:27:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2021-05-06 08:27:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:06,412 INFO L225 Difference]: With dead ends: 119 [2021-05-06 08:27:06,412 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 08:27:06,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:27:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 08:27:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 08:27:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:27:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-06 08:27:06,415 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2021-05-06 08:27:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:06,415 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-06 08:27:06,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 08:27:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-06 08:27:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:27:06,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:06,416 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:06,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:06,629 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1200431299, now seen corresponding path program 11 times [2021-05-06 08:27:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:06,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651465035] [2021-05-06 08:27:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:06,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:06,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871805447] [2021-05-06 08:27:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:06,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 08:27:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:06,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:27:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:06,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:06,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651465035] [2021-05-06 08:27:06,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871805447] [2021-05-06 08:27:06,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871805447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:06,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:06,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:27:06,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417961446] [2021-05-06 08:27:06,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:27:06,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:06,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:27:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:27:06,973 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 08:27:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:07,159 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-05-06 08:27:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:27:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2021-05-06 08:27:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:07,161 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:27:07,161 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:27:07,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:27:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:27:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-06 08:27:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:27:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-06 08:27:07,168 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2021-05-06 08:27:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:07,168 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-06 08:27:07,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 08:27:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-06 08:27:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 08:27:07,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:07,170 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:07,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:27:07,385 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1791180776, now seen corresponding path program 12 times [2021-05-06 08:27:07,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:07,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577167650] [2021-05-06 08:27:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:07,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:07,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751534671] [2021-05-06 08:27:07,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:07,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 08:27:07,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:27:07,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:07,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:07,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:08,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:08,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577167650] [2021-05-06 08:27:08,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:08,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751534671] [2021-05-06 08:27:08,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751534671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:08,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:08,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:27:08,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887483620] [2021-05-06 08:27:08,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:27:08,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:08,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:27:08,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:27:08,088 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 08:27:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:08,265 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2021-05-06 08:27:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 08:27:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2021-05-06 08:27:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:08,266 INFO L225 Difference]: With dead ends: 137 [2021-05-06 08:27:08,266 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 08:27:08,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:27:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 08:27:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 08:27:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:27:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-05-06 08:27:08,271 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2021-05-06 08:27:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:08,271 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-05-06 08:27:08,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 08:27:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-05-06 08:27:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 08:27:08,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:08,272 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:08,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:27:08,478 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:08,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:08,478 INFO L82 PathProgramCache]: Analyzing trace with hash -166555549, now seen corresponding path program 13 times [2021-05-06 08:27:08,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:08,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848891781] [2021-05-06 08:27:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:08,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:08,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522567957] [2021-05-06 08:27:08,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:27:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:08,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:08,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:08,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848891781] [2021-05-06 08:27:08,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:08,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522567957] [2021-05-06 08:27:08,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522567957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:08,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:08,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:27:08,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268562692] [2021-05-06 08:27:08,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:27:08,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:27:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:27:08,851 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 08:27:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:09,068 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2021-05-06 08:27:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 08:27:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2021-05-06 08:27:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:09,069 INFO L225 Difference]: With dead ends: 146 [2021-05-06 08:27:09,069 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 08:27:09,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 08:27:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 08:27:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 08:27:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:27:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-05-06 08:27:09,073 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2021-05-06 08:27:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:09,074 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-05-06 08:27:09,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 08:27:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-05-06 08:27:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:27:09,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:09,075 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:09,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:27:09,293 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash -229972872, now seen corresponding path program 14 times [2021-05-06 08:27:09,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:09,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638079285] [2021-05-06 08:27:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:09,298 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:09,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827945824] [2021-05-06 08:27:09,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:09,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:27:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 08:27:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:09,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:09,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:09,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638079285] [2021-05-06 08:27:09,684 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:09,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827945824] [2021-05-06 08:27:09,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827945824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:09,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:09,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:27:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381751898] [2021-05-06 08:27:09,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:27:09,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:27:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:27:09,689 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 08:27:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:09,933 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2021-05-06 08:27:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 08:27:09,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2021-05-06 08:27:09,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:09,935 INFO L225 Difference]: With dead ends: 155 [2021-05-06 08:27:09,935 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 08:27:09,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:27:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 08:27:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 08:27:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:27:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-05-06 08:27:09,939 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2021-05-06 08:27:09,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:09,939 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-05-06 08:27:09,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 08:27:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-05-06 08:27:09,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 08:27:09,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:09,940 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:10,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:27:10,141 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:10,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1480022019, now seen corresponding path program 15 times [2021-05-06 08:27:10,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:10,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773725133] [2021-05-06 08:27:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:10,156 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:10,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628683656] [2021-05-06 08:27:10,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:15,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 08:27:15,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:27:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:15,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:15,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:16,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:16,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773725133] [2021-05-06 08:27:16,189 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:16,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628683656] [2021-05-06 08:27:16,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628683656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:16,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:16,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:27:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448602220] [2021-05-06 08:27:16,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:27:16,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:16,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:27:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:27:16,191 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 08:27:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:16,409 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2021-05-06 08:27:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 08:27:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2021-05-06 08:27:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:16,411 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:27:16,411 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:27:16,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 08:27:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:27:16,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-06 08:27:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:27:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-05-06 08:27:16,414 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2021-05-06 08:27:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:16,415 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-05-06 08:27:16,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 08:27:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-05-06 08:27:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-06 08:27:16,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:16,415 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:16,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:16,624 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2105323736, now seen corresponding path program 16 times [2021-05-06 08:27:16,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:16,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67622427] [2021-05-06 08:27:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:16,638 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:16,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009907627] [2021-05-06 08:27:16,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:16,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:27:16,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:16,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 08:27:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:16,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:16,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:17,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67622427] [2021-05-06 08:27:17,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009907627] [2021-05-06 08:27:17,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009907627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:17,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:17,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:27:17,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674393009] [2021-05-06 08:27:17,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:27:17,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:17,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:27:17,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:27:17,188 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 08:27:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:17,457 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2021-05-06 08:27:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 08:27:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2021-05-06 08:27:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:17,458 INFO L225 Difference]: With dead ends: 173 [2021-05-06 08:27:17,458 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 08:27:17,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 08:27:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 08:27:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 08:27:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:27:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2021-05-06 08:27:17,468 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2021-05-06 08:27:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:17,468 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2021-05-06 08:27:17,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 08:27:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2021-05-06 08:27:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 08:27:17,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:17,469 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:17,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:17,673 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:17,673 INFO L82 PathProgramCache]: Analyzing trace with hash -170559581, now seen corresponding path program 17 times [2021-05-06 08:27:17,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:17,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499872404] [2021-05-06 08:27:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:17,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:17,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135189494] [2021-05-06 08:27:17,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:17,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 08:27:17,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:17,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 08:27:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:17,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:17,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:18,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:18,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499872404] [2021-05-06 08:27:18,161 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:18,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135189494] [2021-05-06 08:27:18,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135189494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:18,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:18,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 08:27:18,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724759584] [2021-05-06 08:27:18,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:27:18,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:27:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:27:18,162 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 08:27:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:18,439 INFO L93 Difference]: Finished difference Result 182 states and 201 transitions. [2021-05-06 08:27:18,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 08:27:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2021-05-06 08:27:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:18,441 INFO L225 Difference]: With dead ends: 182 [2021-05-06 08:27:18,441 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 08:27:18,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 08:27:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 08:27:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-06 08:27:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:27:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-05-06 08:27:18,445 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2021-05-06 08:27:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:18,445 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-05-06 08:27:18,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 08:27:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-05-06 08:27:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-06 08:27:18,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:18,446 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:18,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:27:18,661 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash -466082504, now seen corresponding path program 18 times [2021-05-06 08:27:18,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:18,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840486381] [2021-05-06 08:27:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:18,666 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:18,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099493751] [2021-05-06 08:27:18,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:26,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 08:27:26,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:26,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 08:27:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:26,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:26,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840486381] [2021-05-06 08:27:26,951 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099493751] [2021-05-06 08:27:26,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099493751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:26,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:26,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 08:27:26,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096935315] [2021-05-06 08:27:26,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 08:27:26,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:26,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 08:27:26,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:27:26,952 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 08:27:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:27,274 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2021-05-06 08:27:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 08:27:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2021-05-06 08:27:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:27,277 INFO L225 Difference]: With dead ends: 191 [2021-05-06 08:27:27,277 INFO L226 Difference]: Without dead ends: 191 [2021-05-06 08:27:27,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 08:27:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-06 08:27:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-06 08:27:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 08:27:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-05-06 08:27:27,281 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2021-05-06 08:27:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:27,281 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-05-06 08:27:27,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 08:27:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-05-06 08:27:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 08:27:27,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:27,282 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:27,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:27,490 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:27,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:27,490 INFO L82 PathProgramCache]: Analyzing trace with hash -733548733, now seen corresponding path program 19 times [2021-05-06 08:27:27,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:27,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922595925] [2021-05-06 08:27:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:27,495 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:27,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252093914] [2021-05-06 08:27:27,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:27:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:27,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:27,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:27,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922595925] [2021-05-06 08:27:27,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:27,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252093914] [2021-05-06 08:27:27,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252093914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:27,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:27,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:27:27,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099407372] [2021-05-06 08:27:27,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:27:27,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:27,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:27:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:27:27,987 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 08:27:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:28,321 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2021-05-06 08:27:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 08:27:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2021-05-06 08:27:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:28,323 INFO L225 Difference]: With dead ends: 200 [2021-05-06 08:27:28,323 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 08:27:28,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 08:27:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 08:27:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-06 08:27:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:27:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-05-06 08:27:28,327 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2021-05-06 08:27:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:28,327 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-05-06 08:27:28,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 08:27:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-05-06 08:27:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-06 08:27:28,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:28,328 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:28,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:27:28,545 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2040315496, now seen corresponding path program 20 times [2021-05-06 08:27:28,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:28,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411902350] [2021-05-06 08:27:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:28,551 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:28,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427738953] [2021-05-06 08:27:28,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:28,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:27:28,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 08:27:28,752 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:27:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:27:28,909 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:27:29,119 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:27:29,119 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:27:29,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:29,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:27:29 BasicIcfg [2021-05-06 08:27:29,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:27:29,407 INFO L168 Benchmark]: Toolchain (without parser) took 68248.40 ms. Allocated memory was 191.9 MB in the beginning and 230.7 MB in the end (delta: 38.8 MB). Free memory was 157.2 MB in the beginning and 153.6 MB in the end (delta: 3.6 MB). Peak memory consumption was 43.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:27:29,407 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 191.9 MB. Free memory is still 173.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:27:29,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.13 ms. Allocated memory is still 191.9 MB. Free memory was 157.0 MB in the beginning and 175.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:27:29,407 INFO L168 Benchmark]: Boogie Preprocessor took 45.07 ms. Allocated memory is still 191.9 MB. Free memory was 175.9 MB in the beginning and 174.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:27:29,407 INFO L168 Benchmark]: RCFGBuilder took 257.24 ms. Allocated memory is still 191.9 MB. Free memory was 174.4 MB in the beginning and 159.2 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:27:29,407 INFO L168 Benchmark]: IcfgTransformer took 11.45 ms. Allocated memory is still 191.9 MB. Free memory was 159.2 MB in the beginning and 158.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:27:29,407 INFO L168 Benchmark]: TraceAbstraction took 67733.89 ms. Allocated memory was 191.9 MB in the beginning and 230.7 MB in the end (delta: 38.8 MB). Free memory was 157.6 MB in the beginning and 153.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 43.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:27:29,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 191.9 MB. Free memory is still 173.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 193.13 ms. Allocated memory is still 191.9 MB. Free memory was 157.0 MB in the beginning and 175.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.07 ms. Allocated memory is still 191.9 MB. Free memory was 175.9 MB in the beginning and 174.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 257.24 ms. Allocated memory is still 191.9 MB. Free memory was 174.4 MB in the beginning and 159.2 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.45 ms. Allocated memory is still 191.9 MB. Free memory was 159.2 MB in the beginning and 158.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 67733.89 ms. Allocated memory was 191.9 MB in the beginning and 230.7 MB in the end (delta: 38.8 MB). Free memory was 157.6 MB in the beginning and 153.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 43.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=36, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(counter)=0, A=40805, counter=0, R=203] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=40805, counter=0, R=203] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [\old(counter)=0, A=40805, counter=0, R=203, r=404, u=407, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=1, counter++=0, R=203, r=404, u=407, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=1, r=404, R=203, u=407, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=1, R=203, r=404, u=407, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=1, r=403, R=203, u=407, v=3] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=2, counter++=1, R=203, r=403, u=407, v=3] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=2, R=203, r=403, u=407, v=3] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=2, r=403, R=203, u=407, v=3] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=2, R=203, r=400, u=407, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=3, counter++=2, R=203, r=400, u=407, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=3, R=203, r=400, u=407, v=5] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=3, r=400, R=203, u=407, v=5] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=3, R=203, r=395, u=407, v=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=4, counter++=3, R=203, r=395, u=407, v=7] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=4, R=203, r=395, u=407, v=7] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=4, R=203, r=395, u=407, v=7] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=4, r=388, R=203, u=407, v=9] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=5, counter++=4, R=203, r=388, u=407, v=9] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=5, R=203, r=388, u=407, v=9] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=5, R=203, r=388, u=407, v=9] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=5, r=379, R=203, u=407, v=11] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=6, counter++=5, R=203, r=379, u=407, v=11] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=6, R=203, r=379, u=407, v=11] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=6, R=203, r=379, u=407, v=11] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=6, r=368, R=203, u=407, v=13] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=7, counter++=6, r=368, R=203, u=407, v=13] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=7, r=368, R=203, u=407, v=13] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=7, R=203, r=368, u=407, v=13] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=7, r=355, R=203, u=407, v=15] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=8, counter++=7, r=355, R=203, u=407, v=15] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=8, r=355, R=203, u=407, v=15] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=8, R=203, r=355, u=407, v=15] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=8, R=203, r=340, u=407, v=17] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=9, counter++=8, r=340, R=203, u=407, v=17] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=9, r=340, R=203, u=407, v=17] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=9, R=203, r=340, u=407, v=17] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=9, R=203, r=323, u=407, v=19] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=10, counter++=9, R=203, r=323, u=407, v=19] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=10, r=323, R=203, u=407, v=19] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=10, r=323, R=203, u=407, v=19] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=10, r=304, R=203, u=407, v=21] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=11, counter++=10, r=304, R=203, u=407, v=21] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=11, r=304, R=203, u=407, v=21] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=11, R=203, r=304, u=407, v=21] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=11, r=283, R=203, u=407, v=23] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=12, counter++=11, R=203, r=283, u=407, v=23] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=12, r=283, R=203, u=407, v=23] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=12, r=283, R=203, u=407, v=23] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=12, r=260, R=203, u=407, v=25] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=13, counter++=12, R=203, r=260, u=407, v=25] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=13, r=260, R=203, u=407, v=25] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=13, R=203, r=260, u=407, v=25] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=13, R=203, r=235, u=407, v=27] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=14, counter++=13, r=235, R=203, u=407, v=27] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=14, R=203, r=235, u=407, v=27] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=14, R=203, r=235, u=407, v=27] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=14, R=203, r=208, u=407, v=29] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=15, counter++=14, r=208, R=203, u=407, v=29] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=15, R=203, r=208, u=407, v=29] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=15, R=203, r=208, u=407, v=29] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=15, R=203, r=179, u=407, v=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=16, counter++=15, R=203, r=179, u=407, v=31] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=16, R=203, r=179, u=407, v=31] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=16, r=179, R=203, u=407, v=31] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=16, R=203, r=148, u=407, v=33] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=17, counter++=16, R=203, r=148, u=407, v=33] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=17, R=203, r=148, u=407, v=33] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=17, r=148, R=203, u=407, v=33] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=17, R=203, r=115, u=407, v=35] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=18, counter++=17, r=115, R=203, u=407, v=35] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=18, r=115, R=203, u=407, v=35] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=18, r=115, R=203, u=407, v=35] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=18, r=80, R=203, u=407, v=37] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=19, counter++=18, r=80, R=203, u=407, v=37] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=19, R=203, r=80, u=407, v=37] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=19, r=80, R=203, u=407, v=37] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=19, r=43, R=203, u=407, v=39] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=20, counter++=19, r=43, R=203, u=407, v=39] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=40805, counter=20, r=43, R=203, u=407, v=39] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=40805, counter=20, R=203, r=43, u=407, v=39] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=40805, counter=20, r=4, R=203, u=407, v=41] [L34] EXPR counter++ VAL [\old(counter)=0, A=40805, counter=21, counter++=20, r=4, R=203, u=407, v=41] [L34] COND FALSE !(counter++<20) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 67588.6ms, OverallIterations: 24, TraceHistogramMax: 21, EmptinessCheckTime: 30.6ms, AutomataDifference: 6007.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 790 SDtfs, 1099 SDslu, 2419 SDs, 0 SdLazy, 1132 SolverSat, 531 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3774.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2415 GetRequests, 1982 SyntacticMatches, 0 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 3082.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=23, InterpolantAutomatonStates: 475, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 122.0ms AutomataMinimizationTime, 23 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 254.8ms SsaConstructionTime, 49503.9ms SatisfiabilityAnalysisTime, 5226.1ms InterpolantComputationTime, 2447 NumberOfCodeBlocks, 2447 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 2221 ConstructedInterpolants, 0 QuantifiedInterpolants, 6449 SizeOfPredicates, 215 NumberOfNonLiveVariables, 6728 ConjunctsInSsa, 502 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 473/11114 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...