/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/fermat1-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:23:02,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:23:02,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:23:02,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:23:02,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:23:02,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:23:02,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:23:02,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:23:02,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:23:02,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:23:02,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:23:02,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:23:02,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:23:02,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:23:02,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:23:02,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:23:02,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:23:02,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:23:02,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:23:02,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:23:02,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:23:02,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:23:02,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:23:02,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:23:02,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:23:02,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:23:02,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:23:02,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:23:02,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:23:02,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:23:02,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:23:02,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:23:02,282 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:23:02,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:23:02,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:23:02,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:23:02,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:23:02,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:23:02,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:23:02,283 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:23:02,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:23:02,283 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:23:02,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:23:02,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:23:02,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:23:02,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:23:02,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:23:02,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:23:02,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:23:02,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:23:02,285 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:23:02,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:23:02,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:23:02,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:23:02,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:23:02,526 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:23:02,526 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:23:02,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2021-05-06 08:23:02,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6fbf710f/f5dc5dafb10b42cdb805f6ecc2c14713/FLAG25028c255 [2021-05-06 08:23:02,931 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:23:02,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2021-05-06 08:23:02,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6fbf710f/f5dc5dafb10b42cdb805f6ecc2c14713/FLAG25028c255 [2021-05-06 08:23:03,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6fbf710f/f5dc5dafb10b42cdb805f6ecc2c14713 [2021-05-06 08:23:03,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:23:03,361 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:23:03,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:23:03,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:23:03,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:23:03,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fed5894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03, skipping insertion in model container [2021-05-06 08:23:03,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:23:03,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:23:03,479 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/fermat1-ll_unwindbound100.c[535,548] [2021-05-06 08:23:03,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:23:03,506 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:23:03,521 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/fermat1-ll_unwindbound100.c[535,548] [2021-05-06 08:23:03,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:23:03,557 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:23:03,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03 WrapperNode [2021-05-06 08:23:03,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:23:03,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:23:03,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:23:03,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:23:03,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:23:03,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:23:03,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:23:03,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:23:03,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (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 08:23:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:23:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:23:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:23:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:23:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:23:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:23:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:23:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:23:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:23:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:23:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:23:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:23:03,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:23:03,919 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:23:03,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:03 BoogieIcfgContainer [2021-05-06 08:23:03,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:23:03,920 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:23:03,920 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:23:03,921 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:23:03,922 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:03" (1/1) ... [2021-05-06 08:23:03,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:23:03 BasicIcfg [2021-05-06 08:23:03,933 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:23:03,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:23:03,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:23:03,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:23:03,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:23:03" (1/4) ... [2021-05-06 08:23:03,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dee66fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:23:03, skipping insertion in model container [2021-05-06 08:23:03,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:03" (2/4) ... [2021-05-06 08:23:03,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dee66fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:23:03, skipping insertion in model container [2021-05-06 08:23:03,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:03" (3/4) ... [2021-05-06 08:23:03,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dee66fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:23:03, skipping insertion in model container [2021-05-06 08:23:03,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:23:03" (4/4) ... [2021-05-06 08:23:03,938 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound100.cJordan [2021-05-06 08:23:03,941 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:23:03,944 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:23:03,956 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:23:03,979 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:23:03,979 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:23:03,979 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:23:03,980 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:23:03,980 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:23:03,980 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:23:03,980 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:23:03,980 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:23:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:23:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:23:04,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:04,003 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 08:23:04,004 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:04,016 INFO L82 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2021-05-06 08:23:04,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:04,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901616678] [2021-05-06 08:23:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:04,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:04,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378157680] [2021-05-06 08:23:04,108 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 08:23:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:23:04,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:04,338 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 08:23:04,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:04,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901616678] [2021-05-06 08:23:04,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:04,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378157680] [2021-05-06 08:23:04,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378157680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:04,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:04,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:23:04,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48069717] [2021-05-06 08:23:04,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:23:04,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:04,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:23:04,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:23:04,352 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 08:23:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:04,365 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-06 08:23:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:23:04,366 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 08:23:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:04,370 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:23:04,370 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:23:04,371 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 08:23:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:23:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:23:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:23:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:23:04,407 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-06 08:23:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:04,407 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:23:04,407 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 08:23:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:23:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:23:04,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:04,409 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 08:23:04,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:23:04,625 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2021-05-06 08:23:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:04,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704168491] [2021-05-06 08:23:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:04,637 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:04,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182319581] [2021-05-06 08:23:04,637 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 08:23:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:23:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:04,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,866 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 08:23:04,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:04,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704168491] [2021-05-06 08:23:04,867 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:04,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182319581] [2021-05-06 08:23:04,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182319581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:04,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:04,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:04,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167802679] [2021-05-06 08:23:04,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:04,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:04,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:04,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:04,869 INFO L87 Difference]: Start difference. First operand 32 states and 41 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 08:23:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:04,886 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-05-06 08:23:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:04,887 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 08:23:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:04,888 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:23:04,888 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:23:04,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:23:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:23:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:23:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 08:23:04,892 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-06 08:23:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:04,893 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 08:23:04,893 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 08:23:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 08:23:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:23:04,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:04,894 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 08:23:05,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:05,105 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2021-05-06 08:23:05,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:05,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155292693] [2021-05-06 08:23:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:05,119 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:05,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288322916] [2021-05-06 08:23:05,120 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 08:23:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:05,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:05,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,349 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 08:23:05,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:05,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155292693] [2021-05-06 08:23:05,350 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:05,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288322916] [2021-05-06 08:23:05,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288322916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:05,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:05,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:23:05,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151256286] [2021-05-06 08:23:05,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:23:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:23:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:05,351 INFO L87 Difference]: Start difference. First operand 34 states and 43 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 08:23:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:06,805 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-06 08:23:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:06,806 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 08:23:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:06,807 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:23:06,807 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:23:06,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:23:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:23:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:23:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-06 08:23:06,812 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-06 08:23:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:06,812 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-06 08:23:06,812 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 08:23:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-06 08:23:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:23:06,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:06,813 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 08:23:07,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:07,017 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:07,017 INFO L82 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2021-05-06 08:23:07,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:07,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187536834] [2021-05-06 08:23:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:07,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:07,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197332612] [2021-05-06 08:23:07,027 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 08:23:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:23:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:07,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,305 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 08:23:07,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:07,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187536834] [2021-05-06 08:23:07,305 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:07,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197332612] [2021-05-06 08:23:07,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197332612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:07,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:07,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:07,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716771223] [2021-05-06 08:23:07,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:07,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:07,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:07,307 INFO L87 Difference]: Start difference. First operand 50 states and 67 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 08:23:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:07,407 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-05-06 08:23:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:23:07,408 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 08:23:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:07,411 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:23:07,411 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 08:23:07,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 08:23:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2021-05-06 08:23:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:23:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-06 08:23:07,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2021-05-06 08:23:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:07,422 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-06 08:23:07,422 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 08:23:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-06 08:23:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:23:07,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:07,424 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, 1, 1, 1] [2021-05-06 08:23:07,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:07,626 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2021-05-06 08:23:07,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:07,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660872456] [2021-05-06 08:23:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:07,641 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:07,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498415351] [2021-05-06 08:23:07,641 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 08:23:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:23:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:07,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:07,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:07,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660872456] [2021-05-06 08:23:07,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:07,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498415351] [2021-05-06 08:23:07,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498415351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:07,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:07,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:23:07,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162952513] [2021-05-06 08:23:07,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:23:07,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:07,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:23:07,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:07,790 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 08:23:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:07,812 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-05-06 08:23:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:07,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 35 [2021-05-06 08:23:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:07,813 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:23:07,813 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:23:07,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:23:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 08:23:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:23:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-05-06 08:23:07,816 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2021-05-06 08:23:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:07,816 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-05-06 08:23:07,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 08:23:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-05-06 08:23:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:23:07,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:07,817 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:08,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:08,033 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2021-05-06 08:23:08,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:08,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247410631] [2021-05-06 08:23:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:08,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:08,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219914436] [2021-05-06 08:23:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:08,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:08,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:08,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:08,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247410631] [2021-05-06 08:23:08,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:08,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219914436] [2021-05-06 08:23:08,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219914436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:08,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:08,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:08,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035747386] [2021-05-06 08:23:08,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:08,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:08,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:08,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:08,170 INFO L87 Difference]: Start difference. First operand 44 states and 51 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 08:23:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:08,205 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-05-06 08:23:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:23:08,206 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 08:23:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:08,206 INFO L225 Difference]: With dead ends: 53 [2021-05-06 08:23:08,206 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 08:23:08,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 08:23:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-06 08:23:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:23:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-05-06 08:23:08,213 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2021-05-06 08:23:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:08,214 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-05-06 08:23:08,214 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 08:23:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-05-06 08:23:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:23:08,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:08,220 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:08,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:08,420 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:08,421 INFO L82 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2021-05-06 08:23:08,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:08,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591979591] [2021-05-06 08:23:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:08,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:08,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344578715] [2021-05-06 08:23:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:23:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:08,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:08,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591979591] [2021-05-06 08:23:08,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344578715] [2021-05-06 08:23:08,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344578715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:08,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:08,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:08,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015370672] [2021-05-06 08:23:08,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:08,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:08,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:08,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:08,601 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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 08:23:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:08,637 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-05-06 08:23:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:23:08,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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 43 [2021-05-06 08:23:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:08,638 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:23:08,638 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:23:08,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:23:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 08:23:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:23:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-05-06 08:23:08,641 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2021-05-06 08:23:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:08,641 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-05-06 08:23:08,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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 08:23:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-05-06 08:23:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:23:08,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:08,642 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:08,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:08,845 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2021-05-06 08:23:08,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:08,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146360608] [2021-05-06 08:23:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:08,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:08,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158784129] [2021-05-06 08:23:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:08,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:08,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:23:08,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:08,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146360608] [2021-05-06 08:23:08,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:08,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158784129] [2021-05-06 08:23:08,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158784129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:08,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:08,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:08,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922159959] [2021-05-06 08:23:08,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:08,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:08,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:08,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:08,974 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:23:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:08,999 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2021-05-06 08:23:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:08,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-06 08:23:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:09,000 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:23:09,000 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 08:23:09,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 08:23:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-05-06 08:23:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:23:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2021-05-06 08:23:09,013 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 47 [2021-05-06 08:23:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:09,014 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2021-05-06 08:23:09,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:23:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2021-05-06 08:23:09,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:23:09,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:09,015 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:09,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:23:09,229 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2021-05-06 08:23:09,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:09,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132474120] [2021-05-06 08:23:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:09,236 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:09,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788268885] [2021-05-06 08:23:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:23:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:09,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:09,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:09,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:09,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:09,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132474120] [2021-05-06 08:23:09,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:09,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788268885] [2021-05-06 08:23:09,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788268885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:09,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:09,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:23:09,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251646824] [2021-05-06 08:23:09,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:23:09,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:09,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:23:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:09,373 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 08:23:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:09,419 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-05-06 08:23:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:23:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 49 [2021-05-06 08:23:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:09,420 INFO L225 Difference]: With dead ends: 81 [2021-05-06 08:23:09,420 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 08:23:09,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 08:23:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-05-06 08:23:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:23:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2021-05-06 08:23:09,425 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 49 [2021-05-06 08:23:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:09,426 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2021-05-06 08:23:09,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 08:23:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2021-05-06 08:23:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:23:09,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:09,427 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:09,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:09,633 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1993056519, now seen corresponding path program 2 times [2021-05-06 08:23:09,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:09,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356434945] [2021-05-06 08:23:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:09,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:09,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51970767] [2021-05-06 08:23:09,640 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 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 08:23:09,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:09,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:09,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:09,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:09,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:09,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:09,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356434945] [2021-05-06 08:23:09,832 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:09,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51970767] [2021-05-06 08:23:09,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51970767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:09,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:09,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:23:09,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581230948] [2021-05-06 08:23:09,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:23:09,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:23:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:09,834 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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 08:23:09,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:09,886 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-05-06 08:23:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:09,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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 51 [2021-05-06 08:23:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:09,887 INFO L225 Difference]: With dead ends: 82 [2021-05-06 08:23:09,887 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:23:09,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:23:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 08:23:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:23:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2021-05-06 08:23:09,898 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 51 [2021-05-06 08:23:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:09,898 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2021-05-06 08:23:09,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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 08:23:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2021-05-06 08:23:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:23:09,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:09,899 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:10,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:10,105 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2021-05-06 08:23:10,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:10,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209991784] [2021-05-06 08:23:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:10,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:10,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376213665] [2021-05-06 08:23:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order 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 08:23:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:10,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:10,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:10,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209991784] [2021-05-06 08:23:10,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:10,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376213665] [2021-05-06 08:23:10,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376213665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:10,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:10,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:10,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009027041] [2021-05-06 08:23:10,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:10,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:10,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:10,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:10,280 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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 08:23:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:10,347 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2021-05-06 08:23:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:10,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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 55 [2021-05-06 08:23:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:10,348 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:23:10,349 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:23:10,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:23:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-05-06 08:23:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:23:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2021-05-06 08:23:10,352 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 55 [2021-05-06 08:23:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:10,352 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2021-05-06 08:23:10,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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 08:23:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2021-05-06 08:23:10,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 08:23:10,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:10,353 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:10,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:23:10,569 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:10,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1625914620, now seen corresponding path program 2 times [2021-05-06 08:23:10,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:10,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62377340] [2021-05-06 08:23:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:10,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:10,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148571442] [2021-05-06 08:23:10,575 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 08:23:10,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:10,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:10,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:10,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:10,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62377340] [2021-05-06 08:23:10,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:10,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148571442] [2021-05-06 08:23:10,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148571442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:10,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:10,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:10,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920307643] [2021-05-06 08:23:10,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:10,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:10,743 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 08:23:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:10,813 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2021-05-06 08:23:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:23:10,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 57 [2021-05-06 08:23:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:10,815 INFO L225 Difference]: With dead ends: 95 [2021-05-06 08:23:10,815 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 08:23:10,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 08:23:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-05-06 08:23:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 68 states have internal predecessors, (82), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:23:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-05-06 08:23:10,818 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 57 [2021-05-06 08:23:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:10,818 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-05-06 08:23:10,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 08:23:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-05-06 08:23:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:23:10,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:10,819 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:11,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:11,030 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1635475232, now seen corresponding path program 3 times [2021-05-06 08:23:11,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:11,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117353347] [2021-05-06 08:23:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:11,036 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:11,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429386247] [2021-05-06 08:23:11,036 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 08:23:11,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 08:23:11,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:11,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:11,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:11,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117353347] [2021-05-06 08:23:11,283 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429386247] [2021-05-06 08:23:11,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429386247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:11,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:11,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:11,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817439310] [2021-05-06 08:23:11,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:11,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:11,285 INFO L87 Difference]: Start difference. First operand 94 states and 116 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 08:23:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:11,368 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-05-06 08:23:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:23:11,368 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 08:23:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:11,369 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:23:11,369 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:23:11,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:23:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 08:23:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:23:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2021-05-06 08:23:11,374 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 59 [2021-05-06 08:23:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:11,374 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2021-05-06 08:23:11,374 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 08:23:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2021-05-06 08:23:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:23:11,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:11,375 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:11,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:23:11,591 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1972951801, now seen corresponding path program 2 times [2021-05-06 08:23:11,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:11,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772678674] [2021-05-06 08:23:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:11,600 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:11,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596353106] [2021-05-06 08:23:11,601 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 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 08:23:11,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:11,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:11,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:11,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:11,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:11,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:11,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772678674] [2021-05-06 08:23:11,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:11,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596353106] [2021-05-06 08:23:11,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596353106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:11,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:11,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:11,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412920409] [2021-05-06 08:23:11,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:11,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:11,767 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 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 08:23:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:11,845 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 08:23:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:23:11,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 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 63 [2021-05-06 08:23:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:11,846 INFO L225 Difference]: With dead ends: 111 [2021-05-06 08:23:11,846 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 08:23:11,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 08:23:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2021-05-06 08:23:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 78 states have internal predecessors, (91), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:23:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2021-05-06 08:23:11,858 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 63 [2021-05-06 08:23:11,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:11,858 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2021-05-06 08:23:11,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 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 08:23:11,858 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2021-05-06 08:23:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:23:11,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:11,859 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:12,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:12,073 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:12,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1807424273, now seen corresponding path program 3 times [2021-05-06 08:23:12,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:12,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165561455] [2021-05-06 08:23:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:12,078 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:12,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561518516] [2021-05-06 08:23:12,078 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 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 08:23:12,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:12,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:12,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:12,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165561455] [2021-05-06 08:23:12,647 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:12,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561518516] [2021-05-06 08:23:12,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561518516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:12,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:12,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:12,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660083971] [2021-05-06 08:23:12,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:12,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:12,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:12,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:12,648 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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 08:23:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:12,744 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2021-05-06 08:23:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:23:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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 65 [2021-05-06 08:23:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:12,746 INFO L225 Difference]: With dead ends: 112 [2021-05-06 08:23:12,746 INFO L226 Difference]: Without dead ends: 112 [2021-05-06 08:23:12,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-06 08:23:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-05-06 08:23:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 80 states have internal predecessors, (95), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:23:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2021-05-06 08:23:12,752 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 65 [2021-05-06 08:23:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:12,752 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2021-05-06 08:23:12,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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 08:23:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2021-05-06 08:23:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:23:12,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:12,753 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:12,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:23:12,957 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash 32887736, now seen corresponding path program 1 times [2021-05-06 08:23:12,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:12,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830106632] [2021-05-06 08:23:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:12,961 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:12,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759501264] [2021-05-06 08:23:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:23:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:13,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:13,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:13,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:13,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:13,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830106632] [2021-05-06 08:23:13,158 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:13,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759501264] [2021-05-06 08:23:13,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759501264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:13,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:13,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:13,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375681864] [2021-05-06 08:23:13,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:13,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:13,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:13,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:13,160 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 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 08:23:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:13,247 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2021-05-06 08:23:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:23:13,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 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 67 [2021-05-06 08:23:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:13,248 INFO L225 Difference]: With dead ends: 114 [2021-05-06 08:23:13,248 INFO L226 Difference]: Without dead ends: 114 [2021-05-06 08:23:13,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-06 08:23:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-05-06 08:23:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:23:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2021-05-06 08:23:13,252 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 67 [2021-05-06 08:23:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:13,252 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2021-05-06 08:23:13,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 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 08:23:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2021-05-06 08:23:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:23:13,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:13,253 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:13,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:23:13,465 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:13,466 INFO L82 PathProgramCache]: Analyzing trace with hash 820062898, now seen corresponding path program 3 times [2021-05-06 08:23:13,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:13,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546191096] [2021-05-06 08:23:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:13,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:13,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78295253] [2021-05-06 08:23:13,470 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 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 08:23:13,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:23:13,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:13,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:13,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:13,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546191096] [2021-05-06 08:23:13,777 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:13,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78295253] [2021-05-06 08:23:13,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78295253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:13,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:13,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:13,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321525349] [2021-05-06 08:23:13,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:13,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:13,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:13,780 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 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 08:23:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:13,877 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2021-05-06 08:23:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:23:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 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 71 [2021-05-06 08:23:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:13,878 INFO L225 Difference]: With dead ends: 132 [2021-05-06 08:23:13,878 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 08:23:13,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 08:23:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2021-05-06 08:23:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 93 states have internal predecessors, (107), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:23:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2021-05-06 08:23:13,881 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 71 [2021-05-06 08:23:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:13,881 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2021-05-06 08:23:13,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 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 08:23:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2021-05-06 08:23:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:23:13,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:13,882 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:14,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:23:14,096 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash -15553925, now seen corresponding path program 1 times [2021-05-06 08:23:14,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:14,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848916663] [2021-05-06 08:23:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:14,102 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:14,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331484226] [2021-05-06 08:23:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:23:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:14,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-05-06 08:23:14,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:14,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848916663] [2021-05-06 08:23:14,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:14,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331484226] [2021-05-06 08:23:14,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331484226] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:14,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:14,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:14,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419136518] [2021-05-06 08:23:14,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:14,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:14,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:14,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:14,233 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:14,249 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-05-06 08:23:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2021-05-06 08:23:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:14,252 INFO L225 Difference]: With dead ends: 143 [2021-05-06 08:23:14,252 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 08:23:14,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 08:23:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-05-06 08:23:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 99 states have (on average 1.202020202020202) internal successors, (119), 102 states have internal predecessors, (119), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:23:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2021-05-06 08:23:14,260 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 73 [2021-05-06 08:23:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:14,261 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2021-05-06 08:23:14,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2021-05-06 08:23:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:23:14,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:14,262 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:14,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:23:14,465 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:14,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2074858534, now seen corresponding path program 4 times [2021-05-06 08:23:14,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:14,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621504503] [2021-05-06 08:23:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:14,469 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:14,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484023849] [2021-05-06 08:23:14,469 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 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 08:23:14,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:14,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:14,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:14,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:14,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621504503] [2021-05-06 08:23:14,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:14,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484023849] [2021-05-06 08:23:14,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484023849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:14,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:14,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:14,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513338039] [2021-05-06 08:23:14,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:14,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:14,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:14,679 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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 08:23:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:14,782 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2021-05-06 08:23:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:23:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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 73 [2021-05-06 08:23:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:14,784 INFO L225 Difference]: With dead ends: 144 [2021-05-06 08:23:14,784 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 08:23:14,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 08:23:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2021-05-06 08:23:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 104 states have internal predecessors, (123), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:23:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2021-05-06 08:23:14,789 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 73 [2021-05-06 08:23:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:14,789 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2021-05-06 08:23:14,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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 08:23:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2021-05-06 08:23:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:23:14,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:14,790 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:14,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:14,997 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 714581215, now seen corresponding path program 1 times [2021-05-06 08:23:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:14,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803061385] [2021-05-06 08:23:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:15,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:15,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800543770] [2021-05-06 08:23:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:23:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:15,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:15,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:15,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803061385] [2021-05-06 08:23:15,196 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:15,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800543770] [2021-05-06 08:23:15,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800543770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:15,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:15,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:15,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155481424] [2021-05-06 08:23:15,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:15,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:15,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:15,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:15,197 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 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 08:23:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:15,327 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2021-05-06 08:23:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:23:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 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 75 [2021-05-06 08:23:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:15,328 INFO L225 Difference]: With dead ends: 146 [2021-05-06 08:23:15,328 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 08:23:15,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 08:23:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 08:23:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 108 states have internal predecessors, (129), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:23:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2021-05-06 08:23:15,342 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 75 [2021-05-06 08:23:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:15,342 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2021-05-06 08:23:15,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 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 08:23:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2021-05-06 08:23:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:23:15,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:15,343 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:15,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:15,553 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash 490493277, now seen corresponding path program 4 times [2021-05-06 08:23:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:15,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989693352] [2021-05-06 08:23:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:15,557 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:15,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870374160] [2021-05-06 08:23:15,557 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 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 08:23:15,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:15,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:15,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:15,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 126 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:15,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:15,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989693352] [2021-05-06 08:23:15,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:15,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870374160] [2021-05-06 08:23:15,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870374160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:15,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:15,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:15,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047979529] [2021-05-06 08:23:15,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:15,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:15,849 INFO L87 Difference]: Start difference. First operand 146 states and 183 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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 08:23:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:15,972 INFO L93 Difference]: Finished difference Result 163 states and 205 transitions. [2021-05-06 08:23:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:23:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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 79 [2021-05-06 08:23:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:15,973 INFO L225 Difference]: With dead ends: 163 [2021-05-06 08:23:15,973 INFO L226 Difference]: Without dead ends: 163 [2021-05-06 08:23:15,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-06 08:23:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2021-05-06 08:23:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 117 states have internal predecessors, (136), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 08:23:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2021-05-06 08:23:15,977 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 79 [2021-05-06 08:23:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:15,977 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2021-05-06 08:23:15,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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 08:23:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2021-05-06 08:23:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 08:23:15,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:15,978 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:16,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:23:16,189 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1885782626, now seen corresponding path program 1 times [2021-05-06 08:23:16,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:16,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869123399] [2021-05-06 08:23:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:16,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:16,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989735535] [2021-05-06 08:23:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:23:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:16,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:16,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:16,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:16,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869123399] [2021-05-06 08:23:16,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:16,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989735535] [2021-05-06 08:23:16,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989735535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:16,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:16,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:16,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950094178] [2021-05-06 08:23:16,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:16,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:16,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:16,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:16,397 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 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 08:23:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:16,547 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2021-05-06 08:23:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:23:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 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 81 [2021-05-06 08:23:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:16,550 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:23:16,550 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:23:16,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:23:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-05-06 08:23:16,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 119 states have internal predecessors, (140), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 08:23:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-06 08:23:16,554 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 81 [2021-05-06 08:23:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:16,554 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-06 08:23:16,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 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 08:23:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-06 08:23:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 08:23:16,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:16,555 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:16,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:16,755 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1757061370, now seen corresponding path program 2 times [2021-05-06 08:23:16,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:16,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547457336] [2021-05-06 08:23:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:16,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:16,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056134852] [2021-05-06 08:23:16,761 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 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 08:23:16,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:16,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:16,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:16,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:16,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:16,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:16,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547457336] [2021-05-06 08:23:16,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:16,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056134852] [2021-05-06 08:23:16,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056134852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:16,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:16,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:16,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049407443] [2021-05-06 08:23:16,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:16,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:16,975 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 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 08:23:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:17,099 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2021-05-06 08:23:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:23:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 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 83 [2021-05-06 08:23:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:17,104 INFO L225 Difference]: With dead ends: 166 [2021-05-06 08:23:17,104 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 08:23:17,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 08:23:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-05-06 08:23:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 08:23:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2021-05-06 08:23:17,111 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 83 [2021-05-06 08:23:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:17,111 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2021-05-06 08:23:17,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 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 08:23:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2021-05-06 08:23:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:23:17,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:17,113 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:17,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:23:17,321 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash 886433253, now seen corresponding path program 1 times [2021-05-06 08:23:17,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:17,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13621530] [2021-05-06 08:23:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:17,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:17,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680949] [2021-05-06 08:23:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:23:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:17,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:17,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:17,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13621530] [2021-05-06 08:23:17,552 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:17,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680949] [2021-05-06 08:23:17,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:17,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:17,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:17,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510820773] [2021-05-06 08:23:17,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:17,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:17,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:17,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:17,553 INFO L87 Difference]: Start difference. First operand 166 states and 208 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 08:23:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:17,704 INFO L93 Difference]: Finished difference Result 183 states and 230 transitions. [2021-05-06 08:23:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:23:17,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 87 [2021-05-06 08:23:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:17,709 INFO L225 Difference]: With dead ends: 183 [2021-05-06 08:23:17,709 INFO L226 Difference]: Without dead ends: 183 [2021-05-06 08:23:17,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-06 08:23:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2021-05-06 08:23:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 129 states have (on average 1.186046511627907) internal successors, (153), 132 states have internal predecessors, (153), 36 states have call successors, (36), 13 states have call predecessors, (36), 11 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:23:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2021-05-06 08:23:17,716 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 87 [2021-05-06 08:23:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:17,716 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2021-05-06 08:23:17,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 08:23:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2021-05-06 08:23:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:23:17,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:17,717 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:17,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:17,933 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1577510477, now seen corresponding path program 2 times [2021-05-06 08:23:17,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:17,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679996909] [2021-05-06 08:23:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:17,939 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:17,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283923886] [2021-05-06 08:23:17,939 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:18,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:23:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:18,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-06 08:23:18,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679996909] [2021-05-06 08:23:18,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283923886] [2021-05-06 08:23:18,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283923886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:18,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:18,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 08:23:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412304421] [2021-05-06 08:23:18,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:18,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:18,114 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:18,134 INFO L93 Difference]: Finished difference Result 303 states and 404 transitions. [2021-05-06 08:23:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2021-05-06 08:23:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:18,135 INFO L225 Difference]: With dead ends: 303 [2021-05-06 08:23:18,135 INFO L226 Difference]: Without dead ends: 301 [2021-05-06 08:23:18,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-05-06 08:23:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2021-05-06 08:23:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 219 states have (on average 1.2191780821917808) internal successors, (267), 225 states have internal predecessors, (267), 65 states have call successors, (65), 13 states have call predecessors, (65), 11 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:23:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 395 transitions. [2021-05-06 08:23:18,146 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 395 transitions. Word has length 89 [2021-05-06 08:23:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:18,146 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 395 transitions. [2021-05-06 08:23:18,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 395 transitions. [2021-05-06 08:23:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:23:18,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:18,148 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:18,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:23:18,353 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1031013193, now seen corresponding path program 3 times [2021-05-06 08:23:18,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:18,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109871277] [2021-05-06 08:23:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:18,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:18,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895556901] [2021-05-06 08:23:18,357 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:18,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:18,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:18,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:18,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 20 proven. 148 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:18,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109871277] [2021-05-06 08:23:18,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895556901] [2021-05-06 08:23:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895556901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:18,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:18,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:18,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606778409] [2021-05-06 08:23:18,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:18,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:18,698 INFO L87 Difference]: Start difference. First operand 296 states and 395 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 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 08:23:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:18,883 INFO L93 Difference]: Finished difference Result 312 states and 413 transitions. [2021-05-06 08:23:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:23:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 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 89 [2021-05-06 08:23:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:18,885 INFO L225 Difference]: With dead ends: 312 [2021-05-06 08:23:18,885 INFO L226 Difference]: Without dead ends: 312 [2021-05-06 08:23:18,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:23:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-06 08:23:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2021-05-06 08:23:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 227 states have (on average 1.2202643171806167) internal successors, (277), 231 states have internal predecessors, (277), 65 states have call successors, (65), 13 states have call predecessors, (65), 11 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:23:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 405 transitions. [2021-05-06 08:23:18,893 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 405 transitions. Word has length 89 [2021-05-06 08:23:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:18,893 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 405 transitions. [2021-05-06 08:23:18,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 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 08:23:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 405 transitions. [2021-05-06 08:23:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:23:18,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:18,895 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2021-05-06 08:23:19,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:23:19,101 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:19,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1443234349, now seen corresponding path program 3 times [2021-05-06 08:23:19,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:19,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205559342] [2021-05-06 08:23:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:19,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:19,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821368215] [2021-05-06 08:23:19,110 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:19,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:19,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:19,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:19,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:19,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:19,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205559342] [2021-05-06 08:23:19,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:19,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821368215] [2021-05-06 08:23:19,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821368215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:19,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:19,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:19,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674016251] [2021-05-06 08:23:19,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:19,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:19,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:19,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:19,512 INFO L87 Difference]: Start difference. First operand 304 states and 405 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 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 08:23:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:19,698 INFO L93 Difference]: Finished difference Result 316 states and 417 transitions. [2021-05-06 08:23:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:23:19,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 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 91 [2021-05-06 08:23:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:19,699 INFO L225 Difference]: With dead ends: 316 [2021-05-06 08:23:19,699 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 08:23:19,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:23:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 08:23:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-05-06 08:23:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 239 states have (on average 1.209205020920502) internal successors, (289), 239 states have internal predecessors, (289), 65 states have call successors, (65), 13 states have call predecessors, (65), 11 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:23:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 417 transitions. [2021-05-06 08:23:19,706 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 417 transitions. Word has length 91 [2021-05-06 08:23:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:19,706 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 417 transitions. [2021-05-06 08:23:19,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 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 08:23:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 417 transitions. [2021-05-06 08:23:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 08:23:19,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:19,707 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 3, 3, 3, 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, 1] [2021-05-06 08:23:19,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:23:19,912 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1900896884, now seen corresponding path program 2 times [2021-05-06 08:23:19,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:19,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134374535] [2021-05-06 08:23:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:19,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:19,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264591918] [2021-05-06 08:23:19,928 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:19,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:19,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:20,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 188 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:20,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:20,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134374535] [2021-05-06 08:23:20,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:20,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264591918] [2021-05-06 08:23:20,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264591918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:20,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:20,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129988491] [2021-05-06 08:23:20,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:20,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:20,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:20,166 INFO L87 Difference]: Start difference. First operand 316 states and 417 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 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 08:23:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:20,359 INFO L93 Difference]: Finished difference Result 349 states and 462 transitions. [2021-05-06 08:23:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:23:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 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 95 [2021-05-06 08:23:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:20,360 INFO L225 Difference]: With dead ends: 349 [2021-05-06 08:23:20,360 INFO L226 Difference]: Without dead ends: 349 [2021-05-06 08:23:20,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:23:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-06 08:23:20,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 336. [2021-05-06 08:23:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 249 states have (on average 1.2088353413654618) internal successors, (301), 255 states have internal predecessors, (301), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:23:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 447 transitions. [2021-05-06 08:23:20,367 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 447 transitions. Word has length 95 [2021-05-06 08:23:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:20,367 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 447 transitions. [2021-05-06 08:23:20,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 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 08:23:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 447 transitions. [2021-05-06 08:23:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:23:20,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:20,368 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2021-05-06 08:23:20,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:23:20,573 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 4 times [2021-05-06 08:23:20,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:20,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878719978] [2021-05-06 08:23:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:20,578 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:20,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989257566] [2021-05-06 08:23:20,579 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:20,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:20,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:20,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:20,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:20,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:20,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878719978] [2021-05-06 08:23:20,860 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989257566] [2021-05-06 08:23:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989257566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:20,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:20,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:20,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490211091] [2021-05-06 08:23:20,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:20,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:20,861 INFO L87 Difference]: Start difference. First operand 336 states and 447 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 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 08:23:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:21,050 INFO L93 Difference]: Finished difference Result 352 states and 465 transitions. [2021-05-06 08:23:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:23:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 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 97 [2021-05-06 08:23:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:21,052 INFO L225 Difference]: With dead ends: 352 [2021-05-06 08:23:21,052 INFO L226 Difference]: Without dead ends: 352 [2021-05-06 08:23:21,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:23:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-06 08:23:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2021-05-06 08:23:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 257 states have (on average 1.2101167315175096) internal successors, (311), 261 states have internal predecessors, (311), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:23:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 457 transitions. [2021-05-06 08:23:21,059 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 457 transitions. Word has length 97 [2021-05-06 08:23:21,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:21,059 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 457 transitions. [2021-05-06 08:23:21,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 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 08:23:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 457 transitions. [2021-05-06 08:23:21,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:23:21,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:21,061 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:21,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:23:21,277 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:21,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1153601599, now seen corresponding path program 4 times [2021-05-06 08:23:21,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:21,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906082278] [2021-05-06 08:23:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:21,281 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:21,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625338125] [2021-05-06 08:23:21,281 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:21,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:21,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:21,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:21,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:21,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:23:21,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906082278] [2021-05-06 08:23:21,445 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625338125] [2021-05-06 08:23:21,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625338125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:21,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:21,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:21,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223331895] [2021-05-06 08:23:21,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:21,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:21,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:21,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:21,446 INFO L87 Difference]: Start difference. First operand 344 states and 457 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:21,465 INFO L93 Difference]: Finished difference Result 397 states and 529 transitions. [2021-05-06 08:23:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:21,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 99 [2021-05-06 08:23:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:21,467 INFO L225 Difference]: With dead ends: 397 [2021-05-06 08:23:21,467 INFO L226 Difference]: Without dead ends: 362 [2021-05-06 08:23:21,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-06 08:23:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2021-05-06 08:23:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 265 states have (on average 1.2150943396226415) internal successors, (322), 269 states have internal predecessors, (322), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:23:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 468 transitions. [2021-05-06 08:23:21,475 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 468 transitions. Word has length 99 [2021-05-06 08:23:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:21,476 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 468 transitions. [2021-05-06 08:23:21,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 468 transitions. [2021-05-06 08:23:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:23:21,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:21,477 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1] [2021-05-06 08:23:21,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:21,689 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:21,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2111868500, now seen corresponding path program 5 times [2021-05-06 08:23:21,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:21,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461453277] [2021-05-06 08:23:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:21,693 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:21,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929382180] [2021-05-06 08:23:21,693 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:21,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:23:21,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:21,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:21,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:21,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461453277] [2021-05-06 08:23:21,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:21,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929382180] [2021-05-06 08:23:21,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929382180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:21,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:21,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:21,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090399151] [2021-05-06 08:23:21,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:21,959 INFO L87 Difference]: Start difference. First operand 352 states and 468 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 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 08:23:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:22,159 INFO L93 Difference]: Finished difference Result 364 states and 480 transitions. [2021-05-06 08:23:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:23:22,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 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 99 [2021-05-06 08:23:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:22,161 INFO L225 Difference]: With dead ends: 364 [2021-05-06 08:23:22,161 INFO L226 Difference]: Without dead ends: 364 [2021-05-06 08:23:22,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:23:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-06 08:23:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2021-05-06 08:23:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 277 states have (on average 1.2057761732851986) internal successors, (334), 277 states have internal predecessors, (334), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:23:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 480 transitions. [2021-05-06 08:23:22,167 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 480 transitions. Word has length 99 [2021-05-06 08:23:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:22,167 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 480 transitions. [2021-05-06 08:23:22,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 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 08:23:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 480 transitions. [2021-05-06 08:23:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 08:23:22,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:22,168 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:22,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:22,385 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 3 times [2021-05-06 08:23:22,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:22,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772423790] [2021-05-06 08:23:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:22,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:22,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942795902] [2021-05-06 08:23:22,395 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:22,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:23:22,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:22,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:23:22,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:22,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:22,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:22,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772423790] [2021-05-06 08:23:22,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:22,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942795902] [2021-05-06 08:23:22,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942795902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:22,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:22,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:23:22,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588946541] [2021-05-06 08:23:22,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:23:22,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:22,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:23:22,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:22,776 INFO L87 Difference]: Start difference. First operand 364 states and 480 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 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 08:23:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:22,973 INFO L93 Difference]: Finished difference Result 402 states and 531 transitions. [2021-05-06 08:23:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:23:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 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 103 [2021-05-06 08:23:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:22,975 INFO L225 Difference]: With dead ends: 402 [2021-05-06 08:23:22,975 INFO L226 Difference]: Without dead ends: 396 [2021-05-06 08:23:22,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:23:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-05-06 08:23:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 377. [2021-05-06 08:23:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 281 states have (on average 1.206405693950178) internal successors, (339), 288 states have internal predecessors, (339), 82 states have call successors, (82), 15 states have call predecessors, (82), 13 states have return successors, (80), 73 states have call predecessors, (80), 80 states have call successors, (80) [2021-05-06 08:23:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 501 transitions. [2021-05-06 08:23:22,982 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 501 transitions. Word has length 103 [2021-05-06 08:23:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:22,982 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 501 transitions. [2021-05-06 08:23:22,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 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 08:23:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 501 transitions. [2021-05-06 08:23:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:23:22,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:22,983 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:23,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:23:23,200 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1970962975, now seen corresponding path program 5 times [2021-05-06 08:23:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:23,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643726233] [2021-05-06 08:23:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:23,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:23,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952891539] [2021-05-06 08:23:23,210 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:23,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:23:23,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:23,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-05-06 08:23:23,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643726233] [2021-05-06 08:23:23,403 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952891539] [2021-05-06 08:23:23,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952891539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:23,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:23,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:23,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555556669] [2021-05-06 08:23:23,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:23,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:23,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:23,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:23,404 INFO L87 Difference]: Start difference. First operand 377 states and 501 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:23:23,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:23,504 INFO L93 Difference]: Finished difference Result 588 states and 816 transitions. [2021-05-06 08:23:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:23:23,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 105 [2021-05-06 08:23:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:23,506 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:23:23,506 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 08:23:23,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 08:23:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 504. [2021-05-06 08:23:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 376 states have (on average 1.247340425531915) internal successors, (469), 386 states have internal predecessors, (469), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 102 states have call predecessors, (112), 112 states have call successors, (112) [2021-05-06 08:23:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 695 transitions. [2021-05-06 08:23:23,521 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 695 transitions. Word has length 105 [2021-05-06 08:23:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:23,521 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 695 transitions. [2021-05-06 08:23:23,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:23:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 695 transitions. [2021-05-06 08:23:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:23:23,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:23,522 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:23,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:23,737 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash 124314395, now seen corresponding path program 6 times [2021-05-06 08:23:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:23,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092129911] [2021-05-06 08:23:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:23,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:23,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007521716] [2021-05-06 08:23:23,741 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:23,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:23:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:23:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:23,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 242 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:24,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092129911] [2021-05-06 08:23:24,163 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007521716] [2021-05-06 08:23:24,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007521716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:24,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:24,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:23:24,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416489115] [2021-05-06 08:23:24,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:23:24,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:23:24,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:24,164 INFO L87 Difference]: Start difference. First operand 504 states and 695 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 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 08:23:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:24,371 INFO L93 Difference]: Finished difference Result 532 states and 727 transitions. [2021-05-06 08:23:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:23:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 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 105 [2021-05-06 08:23:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:24,373 INFO L225 Difference]: With dead ends: 532 [2021-05-06 08:23:24,373 INFO L226 Difference]: Without dead ends: 532 [2021-05-06 08:23:24,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:23:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-06 08:23:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 522. [2021-05-06 08:23:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 394 states have (on average 1.2461928934010151) internal successors, (491), 398 states have internal predecessors, (491), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2021-05-06 08:23:24,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 717 transitions. [2021-05-06 08:23:24,382 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 717 transitions. Word has length 105 [2021-05-06 08:23:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:24,382 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 717 transitions. [2021-05-06 08:23:24,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 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 08:23:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 717 transitions. [2021-05-06 08:23:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:23:24,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:24,384 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2021-05-06 08:23:24,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:23:24,589 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:24,589 INFO L82 PathProgramCache]: Analyzing trace with hash 786170747, now seen corresponding path program 6 times [2021-05-06 08:23:24,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:24,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706393279] [2021-05-06 08:23:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:24,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:24,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201047042] [2021-05-06 08:23:24,594 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:24,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:23:24,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:23:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 260 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:25,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:25,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706393279] [2021-05-06 08:23:25,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:25,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201047042] [2021-05-06 08:23:25,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201047042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:25,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:25,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:23:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464714064] [2021-05-06 08:23:25,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:23:25,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:23:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:25,030 INFO L87 Difference]: Start difference. First operand 522 states and 717 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 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 08:23:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:25,242 INFO L93 Difference]: Finished difference Result 538 states and 733 transitions. [2021-05-06 08:23:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 08:23:25,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 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 107 [2021-05-06 08:23:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:25,244 INFO L225 Difference]: With dead ends: 538 [2021-05-06 08:23:25,244 INFO L226 Difference]: Without dead ends: 538 [2021-05-06 08:23:25,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:23:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-05-06 08:23:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-05-06 08:23:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 410 states have (on average 1.2365853658536585) internal successors, (507), 410 states have internal predecessors, (507), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2021-05-06 08:23:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 733 transitions. [2021-05-06 08:23:25,254 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 733 transitions. Word has length 107 [2021-05-06 08:23:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:25,255 INFO L480 AbstractCegarLoop]: Abstraction has 538 states and 733 transitions. [2021-05-06 08:23:25,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 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 08:23:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 733 transitions. [2021-05-06 08:23:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:23:25,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:25,256 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 4, 4, 4, 4, 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 08:23:25,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:25,461 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash 69261278, now seen corresponding path program 4 times [2021-05-06 08:23:25,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:25,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477051812] [2021-05-06 08:23:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:25,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:25,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850332054] [2021-05-06 08:23:25,466 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:25,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:25,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:23:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:25,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 292 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:25,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:25,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477051812] [2021-05-06 08:23:25,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:25,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850332054] [2021-05-06 08:23:25,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850332054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:25,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:25,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:23:25,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365695987] [2021-05-06 08:23:25,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:23:25,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:25,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:23:25,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:25,745 INFO L87 Difference]: Start difference. First operand 538 states and 733 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 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 08:23:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:25,982 INFO L93 Difference]: Finished difference Result 588 states and 803 transitions. [2021-05-06 08:23:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 08:23:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 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 111 [2021-05-06 08:23:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:25,985 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:23:25,985 INFO L226 Difference]: Without dead ends: 582 [2021-05-06 08:23:25,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:23:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-05-06 08:23:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 560. [2021-05-06 08:23:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-06 08:23:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2021-05-06 08:23:25,995 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 111 [2021-05-06 08:23:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:25,995 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2021-05-06 08:23:25,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 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 08:23:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2021-05-06 08:23:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:23:25,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:25,996 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:26,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 08:23:26,209 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2040709626, now seen corresponding path program 7 times [2021-05-06 08:23:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:26,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163115787] [2021-05-06 08:23:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:26,213 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:26,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915541808] [2021-05-06 08:23:26,213 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:26,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 56 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:23:26,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:26,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163115787] [2021-05-06 08:23:26,443 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:26,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915541808] [2021-05-06 08:23:26,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915541808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:26,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:26,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:26,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432407487] [2021-05-06 08:23:26,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:26,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:26,445 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-06 08:23:26,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:26,632 INFO L93 Difference]: Finished difference Result 711 states and 989 transitions. [2021-05-06 08:23:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 113 [2021-05-06 08:23:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:26,635 INFO L225 Difference]: With dead ends: 711 [2021-05-06 08:23:26,635 INFO L226 Difference]: Without dead ends: 711 [2021-05-06 08:23:26,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-05-06 08:23:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 560. [2021-05-06 08:23:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-06 08:23:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2021-05-06 08:23:26,646 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 113 [2021-05-06 08:23:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:26,646 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2021-05-06 08:23:26,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-06 08:23:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2021-05-06 08:23:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:23:26,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:26,647 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:26,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 08:23:26,861 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 407609090, now seen corresponding path program 8 times [2021-05-06 08:23:26,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:26,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336993925] [2021-05-06 08:23:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:26,868 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:26,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965270822] [2021-05-06 08:23:26,868 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:26,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:26,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:26,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:23:26,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:26,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 302 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:27,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:27,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336993925] [2021-05-06 08:23:27,147 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:27,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965270822] [2021-05-06 08:23:27,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965270822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:27,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:27,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:23:27,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993717740] [2021-05-06 08:23:27,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:23:27,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:27,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:23:27,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:27,154 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 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 08:23:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:27,405 INFO L93 Difference]: Finished difference Result 588 states and 800 transitions. [2021-05-06 08:23:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:23:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 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 113 [2021-05-06 08:23:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:27,407 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:23:27,407 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 08:23:27,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:23:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 08:23:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 578. [2021-05-06 08:23:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 436 states have (on average 1.2339449541284404) internal successors, (538), 440 states have internal predecessors, (538), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 121 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-06 08:23:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 790 transitions. [2021-05-06 08:23:27,417 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 790 transitions. Word has length 113 [2021-05-06 08:23:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:27,417 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 790 transitions. [2021-05-06 08:23:27,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 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 08:23:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 790 transitions. [2021-05-06 08:23:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:23:27,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:27,418 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:27,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:23:27,635 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash -87692013, now seen corresponding path program 7 times [2021-05-06 08:23:27,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:27,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777966616] [2021-05-06 08:23:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:27,639 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:27,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112434329] [2021-05-06 08:23:27,639 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:27,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:23:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:27,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:27,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777966616] [2021-05-06 08:23:27,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112434329] [2021-05-06 08:23:27,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112434329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:27,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:27,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:23:27,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604236570] [2021-05-06 08:23:27,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:23:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:23:27,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:27,906 INFO L87 Difference]: Start difference. First operand 578 states and 790 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 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 08:23:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:28,146 INFO L93 Difference]: Finished difference Result 594 states and 806 transitions. [2021-05-06 08:23:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 08:23:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 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 115 [2021-05-06 08:23:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:28,148 INFO L225 Difference]: With dead ends: 594 [2021-05-06 08:23:28,148 INFO L226 Difference]: Without dead ends: 594 [2021-05-06 08:23:28,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:23:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-05-06 08:23:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-05-06 08:23:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 452 states have (on average 1.2256637168141593) internal successors, (554), 452 states have internal predecessors, (554), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-06 08:23:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 806 transitions. [2021-05-06 08:23:28,158 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 806 transitions. Word has length 115 [2021-05-06 08:23:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:28,158 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 806 transitions. [2021-05-06 08:23:28,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 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 08:23:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 806 transitions. [2021-05-06 08:23:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-06 08:23:28,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:28,160 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 6, 4, 4, 4, 4, 4, 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 08:23:28,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:23:28,373 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1284164229, now seen corresponding path program 5 times [2021-05-06 08:23:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:28,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557539012] [2021-05-06 08:23:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:28,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:28,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120231139] [2021-05-06 08:23:28,379 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:28,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-06 08:23:28,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:23:28,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:28,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:28,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:28,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557539012] [2021-05-06 08:23:28,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:28,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120231139] [2021-05-06 08:23:28,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120231139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:28,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:28,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:23:28,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936738976] [2021-05-06 08:23:28,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:23:28,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:28,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:23:28,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:28,683 INFO L87 Difference]: Start difference. First operand 594 states and 806 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 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 08:23:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:28,967 INFO L93 Difference]: Finished difference Result 644 states and 876 transitions. [2021-05-06 08:23:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 08:23:28,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 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 119 [2021-05-06 08:23:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:28,969 INFO L225 Difference]: With dead ends: 644 [2021-05-06 08:23:28,969 INFO L226 Difference]: Without dead ends: 638 [2021-05-06 08:23:28,969 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:23:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-06 08:23:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 616. [2021-05-06 08:23:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 460 states have (on average 1.2239130434782608) internal successors, (563), 470 states have internal predecessors, (563), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2021-05-06 08:23:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 841 transitions. [2021-05-06 08:23:28,979 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 841 transitions. Word has length 119 [2021-05-06 08:23:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:28,980 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 841 transitions. [2021-05-06 08:23:28,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 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 08:23:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 841 transitions. [2021-05-06 08:23:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 08:23:28,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:28,981 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:29,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:23:29,197 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash -301759511, now seen corresponding path program 9 times [2021-05-06 08:23:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:29,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548551272] [2021-05-06 08:23:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:29,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:29,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864871129] [2021-05-06 08:23:29,201 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:29,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-06 08:23:29,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:29,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:23:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:29,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 370 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:29,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548551272] [2021-05-06 08:23:29,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864871129] [2021-05-06 08:23:29,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864871129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:29,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:29,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:23:29,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875098222] [2021-05-06 08:23:29,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:23:29,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:29,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:23:29,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:29,691 INFO L87 Difference]: Start difference. First operand 616 states and 841 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 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 08:23:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:29,965 INFO L93 Difference]: Finished difference Result 644 states and 873 transitions. [2021-05-06 08:23:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:23:29,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 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 121 [2021-05-06 08:23:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:29,968 INFO L225 Difference]: With dead ends: 644 [2021-05-06 08:23:29,968 INFO L226 Difference]: Without dead ends: 644 [2021-05-06 08:23:29,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:23:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-05-06 08:23:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2021-05-06 08:23:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 478 states have (on average 1.2238493723849373) internal successors, (585), 482 states have internal predecessors, (585), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 134 states have call predecessors, (138), 138 states have call successors, (138) [2021-05-06 08:23:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 863 transitions. [2021-05-06 08:23:29,979 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 863 transitions. Word has length 121 [2021-05-06 08:23:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:29,979 INFO L480 AbstractCegarLoop]: Abstraction has 634 states and 863 transitions. [2021-05-06 08:23:29,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 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 08:23:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 863 transitions. [2021-05-06 08:23:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 08:23:29,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:29,980 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:30,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:30,187 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:30,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1231932614, now seen corresponding path program 8 times [2021-05-06 08:23:30,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:30,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276844703] [2021-05-06 08:23:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:30,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:30,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660046964] [2021-05-06 08:23:30,191 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:30,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:23:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:30,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 350 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:30,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:30,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276844703] [2021-05-06 08:23:30,479 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:30,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660046964] [2021-05-06 08:23:30,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660046964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:30,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:30,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:23:30,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321384733] [2021-05-06 08:23:30,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:23:30,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:30,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:23:30,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:30,480 INFO L87 Difference]: Start difference. First operand 634 states and 863 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 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 08:23:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:30,803 INFO L93 Difference]: Finished difference Result 650 states and 879 transitions. [2021-05-06 08:23:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 08:23:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 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 123 [2021-05-06 08:23:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:30,806 INFO L225 Difference]: With dead ends: 650 [2021-05-06 08:23:30,806 INFO L226 Difference]: Without dead ends: 650 [2021-05-06 08:23:30,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:23:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-05-06 08:23:30,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-05-06 08:23:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 494 states have (on average 1.2165991902834008) internal successors, (601), 494 states have internal predecessors, (601), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2021-05-06 08:23:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 879 transitions. [2021-05-06 08:23:30,815 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 879 transitions. Word has length 123 [2021-05-06 08:23:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:30,816 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 879 transitions. [2021-05-06 08:23:30,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 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 08:23:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 879 transitions. [2021-05-06 08:23:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:23:30,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:30,817 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 7, 7, 5, 4, 4, 4, 4, 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 08:23:31,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:31,022 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:31,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2054740436, now seen corresponding path program 6 times [2021-05-06 08:23:31,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:31,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220618031] [2021-05-06 08:23:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:31,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:31,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581659329] [2021-05-06 08:23:31,027 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:32,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-06 08:23:32,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:32,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:23:32,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:32,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 428 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:32,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:32,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220618031] [2021-05-06 08:23:32,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:32,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581659329] [2021-05-06 08:23:32,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581659329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:32,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:32,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:23:32,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120029329] [2021-05-06 08:23:32,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:23:32,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:23:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:32,327 INFO L87 Difference]: Start difference. First operand 650 states and 879 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 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 08:23:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:32,636 INFO L93 Difference]: Finished difference Result 700 states and 949 transitions. [2021-05-06 08:23:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 08:23:32,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 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 127 [2021-05-06 08:23:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:32,639 INFO L225 Difference]: With dead ends: 700 [2021-05-06 08:23:32,639 INFO L226 Difference]: Without dead ends: 694 [2021-05-06 08:23:32,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=255, Invalid=447, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:23:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-05-06 08:23:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 672. [2021-05-06 08:23:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 502 states have (on average 1.2151394422310757) internal successors, (610), 512 states have internal predecessors, (610), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 141 states have call predecessors, (151), 151 states have call successors, (151) [2021-05-06 08:23:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 914 transitions. [2021-05-06 08:23:32,648 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 914 transitions. Word has length 127 [2021-05-06 08:23:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:32,649 INFO L480 AbstractCegarLoop]: Abstraction has 672 states and 914 transitions. [2021-05-06 08:23:32,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 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 08:23:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 914 transitions. [2021-05-06 08:23:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 08:23:32,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:32,650 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:32,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:32,861 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:32,861 INFO L82 PathProgramCache]: Analyzing trace with hash 462807165, now seen corresponding path program 10 times [2021-05-06 08:23:32,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:32,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954029559] [2021-05-06 08:23:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:32,868 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:32,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430075436] [2021-05-06 08:23:32,868 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:32,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:32,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:32,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:23:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:32,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,966 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-06 08:23:35,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 61 proven. 111 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-05-06 08:23:36,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:36,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954029559] [2021-05-06 08:23:36,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:36,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430075436] [2021-05-06 08:23:36,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430075436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:36,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:36,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:23:36,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254538179] [2021-05-06 08:23:36,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:23:36,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:23:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:23:36,378 INFO L87 Difference]: Start difference. First operand 672 states and 914 transitions. Second operand has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 14 states have internal predecessors, (59), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16)