/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:23:21,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:23:21,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:23:21,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:23:21,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:23:21,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:23:21,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:23:21,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:23:21,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:23:21,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:23:21,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:23:21,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:23:21,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:23:21,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:23:21,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:23:21,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:23:21,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:23:21,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:23:21,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:23:21,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:23:21,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:23:21,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:23:21,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:23:21,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:23:21,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:23:21,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:23:21,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:23:21,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:23:21,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:23:21,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:23:21,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:23:21,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:23:21,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:23:21,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:23:21,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:23:21,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:23:21,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:23:21,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:23:21,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:23:21,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:23:21,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:23:21,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:23:21,680 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:23:21,680 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:23:21,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:23:21,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:23:21,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:23:21,971 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:23:21,972 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:23:21,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2021-05-06 08:23:22,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/441045e3e/452eb2fe3d7640bfb721ffe9fa4edd4f/FLAG7072ffcbd [2021-05-06 08:23:22,370 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:23:22,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2021-05-06 08:23:22,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/441045e3e/452eb2fe3d7640bfb721ffe9fa4edd4f/FLAG7072ffcbd [2021-05-06 08:23:22,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/441045e3e/452eb2fe3d7640bfb721ffe9fa4edd4f [2021-05-06 08:23:22,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:23:22,391 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:23:22,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:23:22,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:23:22,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:23:22,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea5748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22, skipping insertion in model container [2021-05-06 08:23:22,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:23:22,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:23:22,504 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_unwindbound20.c[535,548] [2021-05-06 08:23:22,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:23:22,521 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:23:22,528 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_unwindbound20.c[535,548] [2021-05-06 08:23:22,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:23:22,581 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:23:22,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22 WrapperNode [2021-05-06 08:23:22,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:23:22,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:23:22,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:23:22,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:23:22,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:22,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:23:22,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:23:22,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:23:22,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:23:22,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (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 08:23:22,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:23:22,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:23:22,694 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:23:22,694 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:23:22,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:23:22,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:23:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:23:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:23:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:23:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:23:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:23:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:23:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:23:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:23:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:23:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:23:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:23:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:23:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:23:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:23:22,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:23:22,991 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:23:22,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:22 BoogieIcfgContainer [2021-05-06 08:23:22,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:23:22,992 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:23:22,992 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:23:22,993 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:23:22,994 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:22" (1/1) ... [2021-05-06 08:23:23,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:23:23 BasicIcfg [2021-05-06 08:23:23,004 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:23:23,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:23:23,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:23:23,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:23:23,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:23:22" (1/4) ... [2021-05-06 08:23:23,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6641ae79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:23:23, skipping insertion in model container [2021-05-06 08:23:23,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:22" (2/4) ... [2021-05-06 08:23:23,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6641ae79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:23:23, skipping insertion in model container [2021-05-06 08:23:23,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:22" (3/4) ... [2021-05-06 08:23:23,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6641ae79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:23:23, skipping insertion in model container [2021-05-06 08:23:23,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:23:23" (4/4) ... [2021-05-06 08:23:23,012 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.cJordan [2021-05-06 08:23:23,016 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:23:23,018 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:23:23,029 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:23:23,044 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:23:23,044 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:23:23,044 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:23:23,044 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:23:23,044 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:23:23,044 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:23:23,044 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:23:23,044 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:23:23,052 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 08:23:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:23:23,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:23,057 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 08:23:23,058 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2021-05-06 08:23:23,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:23,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057220744] [2021-05-06 08:23:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:23,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:23,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090861393] [2021-05-06 08:23:23,158 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 08:23:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:23:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:23,277 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 08:23:23,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:23,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057220744] [2021-05-06 08:23:23,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:23,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090861393] [2021-05-06 08:23:23,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090861393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:23,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:23,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:23:23,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871519568] [2021-05-06 08:23:23,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:23:23,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:23,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:23:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:23:23,291 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 08:23:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:23,301 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-06 08:23:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:23:23,302 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 08:23:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:23,306 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:23:23,307 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:23:23,307 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 08:23:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:23:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:23:23,337 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 08:23:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:23:23,339 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-06 08:23:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:23,339 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:23:23,339 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 08:23:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:23:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:23:23,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:23,340 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 08:23:23,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:23:23,557 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:23,558 INFO L82 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2021-05-06 08:23:23,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:23,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599671024] [2021-05-06 08:23:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:23,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:23,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792234167] [2021-05-06 08:23:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:23,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:23:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:23,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,724 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 08:23:23,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:23,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599671024] [2021-05-06 08:23:23,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:23,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792234167] [2021-05-06 08:23:23,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792234167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:23,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:23,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:23,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262363091] [2021-05-06 08:23:23,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:23,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:23,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:23,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:23,727 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 08:23:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:23,739 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-05-06 08:23:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:23,739 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 08:23:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:23,740 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:23:23,740 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:23:23,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:23:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:23:23,744 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 08:23:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 08:23:23,745 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-06 08:23:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:23,745 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 08:23:23,746 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 08:23:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 08:23:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:23:23,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:23,746 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 08:23:23,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:23,965 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2021-05-06 08:23:23,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:23,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802634865] [2021-05-06 08:23:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:23,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:23,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899056266] [2021-05-06 08:23:23,978 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 08:23:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:24,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:24,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,164 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 08:23:24,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802634865] [2021-05-06 08:23:24,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899056266] [2021-05-06 08:23:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899056266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:24,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:24,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:23:24,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837493574] [2021-05-06 08:23:24,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:23:24,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:24,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:23:24,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:24,166 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 08:23:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:25,638 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-06 08:23:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:25,638 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 08:23:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:25,639 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:23:25,639 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:23:25,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:23:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:23:25,645 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 08:23:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-06 08:23:25,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-06 08:23:25,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:25,646 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-06 08:23:25,646 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 08:23:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-06 08:23:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:23:25,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:25,647 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 08:23:25,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:25,849 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2021-05-06 08:23:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:25,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244159635] [2021-05-06 08:23:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:25,860 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:25,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632464231] [2021-05-06 08:23:25,860 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 08:23:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:23:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:25,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,020 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 08:23:26,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244159635] [2021-05-06 08:23:26,020 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632464231] [2021-05-06 08:23:26,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632464231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:26,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:26,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:26,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101848733] [2021-05-06 08:23:26,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:26,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:26,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:26,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:26,022 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 08:23:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:26,125 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-05-06 08:23:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:23:26,126 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 08:23:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:26,126 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:23:26,126 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 08:23:26,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 08:23:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2021-05-06 08:23:26,130 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 08:23:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-06 08:23:26,130 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2021-05-06 08:23:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:26,131 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-06 08:23:26,131 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 08:23:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-06 08:23:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:23:26,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:26,132 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 08:23:26,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:26,339 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:26,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2021-05-06 08:23:26,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:26,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010007557] [2021-05-06 08:23:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:26,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:26,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464602451] [2021-05-06 08:23:26,349 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 08:23:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:26,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:23:26,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:26,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,472 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 08:23:26,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:26,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010007557] [2021-05-06 08:23:26,473 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:26,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464602451] [2021-05-06 08:23:26,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464602451] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:26,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:26,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:23:26,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750331667] [2021-05-06 08:23:26,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:23:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:23:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:26,474 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 08:23:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:26,498 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-05-06 08:23:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:26,499 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 08:23:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:26,499 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:23:26,500 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:23:26,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:23:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 08:23:26,502 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 08:23:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-05-06 08:23:26,503 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2021-05-06 08:23:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:26,503 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-05-06 08:23:26,503 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 08:23:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-05-06 08:23:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:23:26,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:26,504 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 08:23:26,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:26,705 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2021-05-06 08:23:26,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:26,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921727568] [2021-05-06 08:23:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:26,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:26,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542484355] [2021-05-06 08:23:26,716 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 08:23:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:26,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:26,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,876 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 08:23:26,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:26,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921727568] [2021-05-06 08:23:26,877 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:26,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542484355] [2021-05-06 08:23:26,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542484355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:26,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:26,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:26,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561118764] [2021-05-06 08:23:26,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:26,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:26,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:26,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:26,878 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 08:23:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:26,930 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-05-06 08:23:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:23:26,932 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 08:23:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:26,937 INFO L225 Difference]: With dead ends: 53 [2021-05-06 08:23:26,938 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 08:23:26,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 08:23:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-06 08:23:26,944 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 08:23:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-05-06 08:23:26,945 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2021-05-06 08:23:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:26,945 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-05-06 08:23:26,945 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 08:23:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-05-06 08:23:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:23:26,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:26,946 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 08:23:27,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:27,161 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:27,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:27,162 INFO L82 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2021-05-06 08:23:27,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:27,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639289331] [2021-05-06 08:23:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:27,169 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:27,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283167477] [2021-05-06 08:23:27,169 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 08:23:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:27,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,317 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 08:23:27,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:27,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639289331] [2021-05-06 08:23:27,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:27,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283167477] [2021-05-06 08:23:27,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283167477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:27,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:27,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040647846] [2021-05-06 08:23:27,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:27,319 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 08:23:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:27,361 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-05-06 08:23:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:23:27,361 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 08:23:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:27,362 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:23:27,362 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:23:27,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:23:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 08:23:27,364 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 08:23:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-05-06 08:23:27,365 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2021-05-06 08:23:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:27,365 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-05-06 08:23:27,365 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 08:23:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-05-06 08:23:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:23:27,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:27,366 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 08:23:27,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:27,575 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2021-05-06 08:23:27,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:27,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800611928] [2021-05-06 08:23:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:27,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:27,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285037687] [2021-05-06 08:23:27,584 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 08:23:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:27,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:27,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,721 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 08:23:27,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:27,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800611928] [2021-05-06 08:23:27,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285037687] [2021-05-06 08:23:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285037687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:27,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:27,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:27,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175511816] [2021-05-06 08:23:27,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:27,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:27,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:27,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:27,723 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 08:23:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:27,755 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2021-05-06 08:23:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:27,755 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 08:23:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:27,756 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:23:27,757 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 08:23:27,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 08:23:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-05-06 08:23:27,761 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 08:23:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2021-05-06 08:23:27,762 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 47 [2021-05-06 08:23:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:27,762 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2021-05-06 08:23:27,762 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 08:23:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2021-05-06 08:23:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:23:27,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:27,763 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 08:23:27,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:23:27,981 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2021-05-06 08:23:27,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:27,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724860355] [2021-05-06 08:23:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:27,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:27,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973002917] [2021-05-06 08:23:27,989 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 08:23:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:28,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:28,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,142 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 08:23:28,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:28,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724860355] [2021-05-06 08:23:28,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:28,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973002917] [2021-05-06 08:23:28,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973002917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:28,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:28,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:23:28,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138405803] [2021-05-06 08:23:28,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:23:28,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:23:28,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:28,144 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 08:23:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:28,194 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-05-06 08:23:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:23:28,194 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 08:23:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:28,196 INFO L225 Difference]: With dead ends: 81 [2021-05-06 08:23:28,196 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 08:23:28,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 08:23:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-05-06 08:23:28,207 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 08:23:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2021-05-06 08:23:28,212 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 49 [2021-05-06 08:23:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:28,214 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2021-05-06 08:23:28,215 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 08:23:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2021-05-06 08:23:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:23:28,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:28,215 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 08:23:28,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:28,416 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:28,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1993056519, now seen corresponding path program 2 times [2021-05-06 08:23:28,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:28,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215235416] [2021-05-06 08:23:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:28,423 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:28,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149206020] [2021-05-06 08:23:28,423 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 08:23:28,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:28,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:28,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:28,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,508 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 08:23:28,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,586 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 08:23:28,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:28,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215235416] [2021-05-06 08:23:28,586 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:28,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149206020] [2021-05-06 08:23:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149206020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:28,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:28,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:23:28,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799483599] [2021-05-06 08:23:28,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:23:28,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:28,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:23:28,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:28,587 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 08:23:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:28,636 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-05-06 08:23:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:28,637 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 08:23:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:28,638 INFO L225 Difference]: With dead ends: 82 [2021-05-06 08:23:28,638 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:23:28,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:23:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 08:23:28,657 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 08:23:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2021-05-06 08:23:28,658 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 51 [2021-05-06 08:23:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:28,659 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2021-05-06 08:23:28,659 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 08:23:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2021-05-06 08:23:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:23:28,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:28,663 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 08:23:28,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:28,871 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:28,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2021-05-06 08:23:28,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:28,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814776063] [2021-05-06 08:23:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:28,878 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:28,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933570612] [2021-05-06 08:23:28,878 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 08:23:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:28,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:28,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:28,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:28,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,060 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 08:23:29,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:29,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814776063] [2021-05-06 08:23:29,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:29,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933570612] [2021-05-06 08:23:29,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933570612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:29,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:29,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:29,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097325964] [2021-05-06 08:23:29,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:29,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:29,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:29,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:29,061 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 08:23:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:29,132 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2021-05-06 08:23:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:29,133 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 08:23:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:29,133 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:23:29,133 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:23:29,134 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:29,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:23:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-05-06 08:23:29,136 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 08:23:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2021-05-06 08:23:29,137 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 55 [2021-05-06 08:23:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:29,137 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2021-05-06 08:23:29,137 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 08:23:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2021-05-06 08:23:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 08:23:29,138 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:29,138 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 08:23:29,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:23:29,339 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1625914620, now seen corresponding path program 2 times [2021-05-06 08:23:29,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:29,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687924072] [2021-05-06 08:23:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:29,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:29,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808200503] [2021-05-06 08:23:29,346 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 08:23:29,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:29,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,496 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 08:23:29,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:29,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687924072] [2021-05-06 08:23:29,497 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:29,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808200503] [2021-05-06 08:23:29,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808200503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:29,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:29,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:29,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972231068] [2021-05-06 08:23:29,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:29,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:29,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:29,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:29,499 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 08:23:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:29,563 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2021-05-06 08:23:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:23:29,563 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 08:23:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:29,564 INFO L225 Difference]: With dead ends: 95 [2021-05-06 08:23:29,564 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 08:23:29,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 08:23:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-05-06 08:23:29,567 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 08:23:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-05-06 08:23:29,568 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 57 [2021-05-06 08:23:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:29,568 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-05-06 08:23:29,568 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 08:23:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-05-06 08:23:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:23:29,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:29,569 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 08:23:29,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:29,785 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1635475232, now seen corresponding path program 3 times [2021-05-06 08:23:29,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:29,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406745892] [2021-05-06 08:23:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:29,791 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:29,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111060667] [2021-05-06 08:23:29,791 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 08:23:29,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 08:23:29,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:29,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:29,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:29,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:29,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,054 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 08:23:30,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:30,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406745892] [2021-05-06 08:23:30,055 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:30,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111060667] [2021-05-06 08:23:30,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111060667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:30,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:30,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:30,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633143790] [2021-05-06 08:23:30,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:30,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:30,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:30,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:30,056 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 08:23:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:30,129 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-05-06 08:23:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:23:30,130 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 08:23:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:30,130 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:23:30,130 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:23:30,131 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 08:23:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:23:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 08:23:30,133 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 08:23:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2021-05-06 08:23:30,134 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 59 [2021-05-06 08:23:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:30,134 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2021-05-06 08:23:30,134 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 08:23:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2021-05-06 08:23:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:23:30,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:30,135 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 08:23:30,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:23:30,348 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1972951801, now seen corresponding path program 2 times [2021-05-06 08:23:30,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:30,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605276264] [2021-05-06 08:23:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:30,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:30,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707831926] [2021-05-06 08:23:30,353 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 08:23:30,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:30,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:30,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:30,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [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 08:23:30,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:30,538 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 08:23:30,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:30,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605276264] [2021-05-06 08:23:30,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:30,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707831926] [2021-05-06 08:23:30,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707831926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:30,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:30,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:30,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592722636] [2021-05-06 08:23:30,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:30,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:30,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:30,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:30,539 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 08:23:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:30,617 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 08:23:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:23:30,617 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 08:23:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:30,618 INFO L225 Difference]: With dead ends: 111 [2021-05-06 08:23:30,618 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 08:23:30,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 08:23:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2021-05-06 08:23:30,621 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 08:23:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2021-05-06 08:23:30,621 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 63 [2021-05-06 08:23:30,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:30,621 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2021-05-06 08:23:30,621 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 08:23:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2021-05-06 08:23:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:23:30,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:30,622 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 08:23:30,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:30,837 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:30,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1807424273, now seen corresponding path program 3 times [2021-05-06 08:23:30,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:30,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033721131] [2021-05-06 08:23:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:30,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:30,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052925668] [2021-05-06 08:23:30,842 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 08:23:31,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:31,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:31,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,433 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 08:23:31,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:31,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033721131] [2021-05-06 08:23:31,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:31,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052925668] [2021-05-06 08:23:31,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052925668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:31,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:31,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:31,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635757917] [2021-05-06 08:23:31,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:31,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:31,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:31,435 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 08:23:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:31,525 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2021-05-06 08:23:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:23:31,525 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 08:23:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:31,526 INFO L225 Difference]: With dead ends: 112 [2021-05-06 08:23:31,526 INFO L226 Difference]: Without dead ends: 112 [2021-05-06 08:23:31,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-06 08:23:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-05-06 08:23:31,529 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 08:23:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2021-05-06 08:23:31,530 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 65 [2021-05-06 08:23:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:31,530 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2021-05-06 08:23:31,530 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 08:23:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2021-05-06 08:23:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:23:31,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:31,531 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 08:23:31,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:23:31,733 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash 32887736, now seen corresponding path program 1 times [2021-05-06 08:23:31,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:31,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772524252] [2021-05-06 08:23:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:31,738 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:31,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307900044] [2021-05-06 08:23:31,738 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 08:23:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:31,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:31,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:31,905 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 08:23:31,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772524252] [2021-05-06 08:23:31,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307900044] [2021-05-06 08:23:31,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307900044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:31,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:31,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:31,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857244845] [2021-05-06 08:23:31,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:31,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:31,907 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 08:23:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:31,989 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2021-05-06 08:23:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:23:31,989 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 08:23:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:31,990 INFO L225 Difference]: With dead ends: 114 [2021-05-06 08:23:31,990 INFO L226 Difference]: Without dead ends: 114 [2021-05-06 08:23:31,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-06 08:23:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-05-06 08:23:31,993 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 08:23:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2021-05-06 08:23:31,993 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 67 [2021-05-06 08:23:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:31,994 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2021-05-06 08:23:31,994 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 08:23:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2021-05-06 08:23:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:23:31,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:31,994 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 08:23:32,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:23:32,200 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:32,200 INFO L82 PathProgramCache]: Analyzing trace with hash 820062898, now seen corresponding path program 3 times [2021-05-06 08:23:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:32,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117159870] [2021-05-06 08:23:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:32,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:32,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902845954] [2021-05-06 08:23:32,205 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 08:23:32,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:23:32,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:32,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:32,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,534 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 08:23:32,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:32,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117159870] [2021-05-06 08:23:32,534 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:32,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902845954] [2021-05-06 08:23:32,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902845954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:32,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:32,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:32,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601385778] [2021-05-06 08:23:32,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:32,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:32,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:32,535 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 08:23:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:32,633 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2021-05-06 08:23:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:23:32,633 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 08:23:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:32,636 INFO L225 Difference]: With dead ends: 132 [2021-05-06 08:23:32,636 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 08:23:32,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 08:23:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2021-05-06 08:23:32,639 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 08:23:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2021-05-06 08:23:32,639 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 71 [2021-05-06 08:23:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:32,640 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2021-05-06 08:23:32,640 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 08:23:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2021-05-06 08:23:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:23:32,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:32,641 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 08:23:32,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:23:32,849 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:32,849 INFO L82 PathProgramCache]: Analyzing trace with hash -15553925, now seen corresponding path program 1 times [2021-05-06 08:23:32,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:32,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609302072] [2021-05-06 08:23:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:32,854 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:32,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682273041] [2021-05-06 08:23:32,854 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 08:23:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:32,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:32,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:32,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:32,989 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 08:23:32,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609302072] [2021-05-06 08:23:32,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682273041] [2021-05-06 08:23:32,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682273041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:32,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:32,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:32,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996541667] [2021-05-06 08:23:32,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:32,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:32,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:32,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:32,993 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 08:23:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:33,009 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-05-06 08:23:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:33,009 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 08:23:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:33,011 INFO L225 Difference]: With dead ends: 143 [2021-05-06 08:23:33,011 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 08:23:33,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 08:23:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-05-06 08:23:33,018 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 08:23:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2021-05-06 08:23:33,020 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 73 [2021-05-06 08:23:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:33,020 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2021-05-06 08:23:33,020 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 08:23:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2021-05-06 08:23:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:23:33,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:33,021 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 08:23:33,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:23:33,233 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:33,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2074858534, now seen corresponding path program 4 times [2021-05-06 08:23:33,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:33,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70838170] [2021-05-06 08:23:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:33,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:33,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082217791] [2021-05-06 08:23:33,238 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 08:23:33,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:33,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:33,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:33,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:33,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,368 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 08:23:33,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,397 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 08:23:33,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,423 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 08:23:33,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70838170] [2021-05-06 08:23:33,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082217791] [2021-05-06 08:23:33,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082217791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:33,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:33,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:33,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497184050] [2021-05-06 08:23:33,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:33,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:33,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:33,426 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 08:23:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:33,537 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2021-05-06 08:23:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:23:33,537 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 08:23:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:33,539 INFO L225 Difference]: With dead ends: 144 [2021-05-06 08:23:33,539 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 08:23:33,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 08:23:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2021-05-06 08:23:33,545 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 08:23:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2021-05-06 08:23:33,545 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 73 [2021-05-06 08:23:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:33,545 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2021-05-06 08:23:33,546 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 08:23:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2021-05-06 08:23:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:23:33,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:33,547 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 08:23:33,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:33,764 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash 714581215, now seen corresponding path program 1 times [2021-05-06 08:23:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:33,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914007615] [2021-05-06 08:23:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:33,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:33,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756793713] [2021-05-06 08:23:33,774 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 08:23:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:33,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,957 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 08:23:33,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:33,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914007615] [2021-05-06 08:23:33,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:33,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756793713] [2021-05-06 08:23:33,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756793713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:33,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:33,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:33,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208605074] [2021-05-06 08:23:33,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:33,959 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 08:23:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:34,110 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2021-05-06 08:23:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:23:34,111 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 08:23:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:34,112 INFO L225 Difference]: With dead ends: 146 [2021-05-06 08:23:34,112 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 08:23:34,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 08:23:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 08:23:34,117 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 08:23:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2021-05-06 08:23:34,118 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 75 [2021-05-06 08:23:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:34,118 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2021-05-06 08:23:34,118 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 08:23:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2021-05-06 08:23:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:23:34,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:34,119 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 08:23:34,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:34,325 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash 490493277, now seen corresponding path program 4 times [2021-05-06 08:23:34,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:34,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347758374] [2021-05-06 08:23:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:34,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:34,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869908353] [2021-05-06 08:23:34,330 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 08:23:34,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:34,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,623 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 08:23:34,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:34,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347758374] [2021-05-06 08:23:34,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:34,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869908353] [2021-05-06 08:23:34,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869908353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:34,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:34,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:34,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146039816] [2021-05-06 08:23:34,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:34,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:34,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:34,625 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 08:23:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:34,761 INFO L93 Difference]: Finished difference Result 163 states and 205 transitions. [2021-05-06 08:23:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:23:34,761 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 08:23:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:34,762 INFO L225 Difference]: With dead ends: 163 [2021-05-06 08:23:34,762 INFO L226 Difference]: Without dead ends: 163 [2021-05-06 08:23:34,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-06 08:23:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2021-05-06 08:23:34,765 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 08:23:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2021-05-06 08:23:34,766 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 79 [2021-05-06 08:23:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:34,766 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2021-05-06 08:23:34,766 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 08:23:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2021-05-06 08:23:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 08:23:34,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:34,767 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 08:23:34,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:23:34,981 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:34,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1885782626, now seen corresponding path program 1 times [2021-05-06 08:23:34,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:34,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995779188] [2021-05-06 08:23:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:34,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:34,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374779852] [2021-05-06 08:23:34,988 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 08:23:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:35,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,178 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 08:23:35,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995779188] [2021-05-06 08:23:35,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374779852] [2021-05-06 08:23:35,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374779852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:35,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:35,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:35,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541535849] [2021-05-06 08:23:35,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:35,180 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 08:23:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:35,312 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2021-05-06 08:23:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:23:35,317 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 08:23:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:35,318 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:23:35,318 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:23:35,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:23:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-05-06 08:23:35,322 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 08:23:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-06 08:23:35,323 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 81 [2021-05-06 08:23:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:35,323 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-06 08:23:35,323 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 08:23:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-06 08:23:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 08:23:35,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:35,324 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 08:23:35,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:35,542 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:35,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1757061370, now seen corresponding path program 2 times [2021-05-06 08:23:35,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:35,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308815471] [2021-05-06 08:23:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:35,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:35,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462956366] [2021-05-06 08:23:35,547 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 08:23:35,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:35,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:35,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:35,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:35,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:35,734 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 08:23:35,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308815471] [2021-05-06 08:23:35,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462956366] [2021-05-06 08:23:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462956366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:35,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:35,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297227195] [2021-05-06 08:23:35,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:35,735 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 08:23:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:35,876 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2021-05-06 08:23:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:23:35,876 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 08:23:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:35,879 INFO L225 Difference]: With dead ends: 166 [2021-05-06 08:23:35,879 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 08:23:35,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 08:23:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-05-06 08:23:35,882 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 08:23:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2021-05-06 08:23:35,883 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 83 [2021-05-06 08:23:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:35,883 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2021-05-06 08:23:35,883 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 08:23:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2021-05-06 08:23:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:23:35,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:35,884 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 08:23:36,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:23:36,101 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 886433253, now seen corresponding path program 1 times [2021-05-06 08:23:36,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:36,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046731358] [2021-05-06 08:23:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:36,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:36,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121347933] [2021-05-06 08:23:36,111 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 08:23:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:36,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,316 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 08:23:36,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:36,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046731358] [2021-05-06 08:23:36,317 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:36,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121347933] [2021-05-06 08:23:36,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121347933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:36,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:36,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:36,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135633908] [2021-05-06 08:23:36,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:36,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:36,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:36,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:36,318 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 08:23:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:36,456 INFO L93 Difference]: Finished difference Result 183 states and 230 transitions. [2021-05-06 08:23:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:23:36,457 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 08:23:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:36,457 INFO L225 Difference]: With dead ends: 183 [2021-05-06 08:23:36,458 INFO L226 Difference]: Without dead ends: 183 [2021-05-06 08:23:36,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-06 08:23:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2021-05-06 08:23:36,462 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 08:23:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2021-05-06 08:23:36,462 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 87 [2021-05-06 08:23:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:36,463 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2021-05-06 08:23:36,463 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 08:23:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2021-05-06 08:23:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:23:36,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:36,464 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 08:23:36,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:36,677 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1577510477, now seen corresponding path program 2 times [2021-05-06 08:23:36,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:36,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843559975] [2021-05-06 08:23:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:36,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:36,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54061001] [2021-05-06 08:23:36,682 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 08:23:36,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:36,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:36,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:23:36,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:36,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:36,861 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 08:23:36,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:36,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843559975] [2021-05-06 08:23:36,861 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:36,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54061001] [2021-05-06 08:23:36,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54061001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:36,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:36,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 08:23:36,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007763163] [2021-05-06 08:23:36,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:36,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:36,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:36,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:36,862 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 08:23:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:36,890 INFO L93 Difference]: Finished difference Result 303 states and 404 transitions. [2021-05-06 08:23:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:36,891 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 08:23:36,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:36,892 INFO L225 Difference]: With dead ends: 303 [2021-05-06 08:23:36,892 INFO L226 Difference]: Without dead ends: 301 [2021-05-06 08:23:36,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-05-06 08:23:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2021-05-06 08:23:36,904 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 08:23:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 395 transitions. [2021-05-06 08:23:36,905 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 395 transitions. Word has length 89 [2021-05-06 08:23:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:36,905 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 395 transitions. [2021-05-06 08:23:36,906 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 08:23:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 395 transitions. [2021-05-06 08:23:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:23:36,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:36,907 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 08:23:37,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:23:37,111 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1031013193, now seen corresponding path program 3 times [2021-05-06 08:23:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:37,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767195770] [2021-05-06 08:23:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:37,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:37,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066403067] [2021-05-06 08:23:37,118 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 08:23:37,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:37,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:37,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:37,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:37,473 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 08:23:37,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:37,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767195770] [2021-05-06 08:23:37,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:37,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066403067] [2021-05-06 08:23:37,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066403067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:37,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:37,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:37,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980464713] [2021-05-06 08:23:37,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:37,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:37,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:37,478 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 08:23:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:37,625 INFO L93 Difference]: Finished difference Result 312 states and 413 transitions. [2021-05-06 08:23:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:23:37,625 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 08:23:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:37,626 INFO L225 Difference]: With dead ends: 312 [2021-05-06 08:23:37,626 INFO L226 Difference]: Without dead ends: 312 [2021-05-06 08:23:37,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:23:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-06 08:23:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2021-05-06 08:23:37,646 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 08:23:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 405 transitions. [2021-05-06 08:23:37,647 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 405 transitions. Word has length 89 [2021-05-06 08:23:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:37,647 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 405 transitions. [2021-05-06 08:23:37,647 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 08:23:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 405 transitions. [2021-05-06 08:23:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:23:37,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:37,648 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 08:23:37,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:23:37,853 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:37,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1443234349, now seen corresponding path program 3 times [2021-05-06 08:23:37,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:37,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58053543] [2021-05-06 08:23:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:37,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:37,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434175455] [2021-05-06 08:23:37,858 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 08:23:38,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:38,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:38,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,190 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 08:23:38,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:38,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58053543] [2021-05-06 08:23:38,190 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:38,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434175455] [2021-05-06 08:23:38,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434175455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:38,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:38,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:38,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577747629] [2021-05-06 08:23:38,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:38,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:38,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:38,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:38,191 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 08:23:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:38,368 INFO L93 Difference]: Finished difference Result 316 states and 417 transitions. [2021-05-06 08:23:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:23:38,369 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 08:23:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:38,370 INFO L225 Difference]: With dead ends: 316 [2021-05-06 08:23:38,370 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 08:23:38,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:23:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 08:23:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-05-06 08:23:38,375 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 08:23:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 417 transitions. [2021-05-06 08:23:38,377 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 417 transitions. Word has length 91 [2021-05-06 08:23:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:38,377 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 417 transitions. [2021-05-06 08:23:38,377 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 08:23:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 417 transitions. [2021-05-06 08:23:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 08:23:38,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:38,378 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 08:23:38,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:23:38,585 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1900896884, now seen corresponding path program 2 times [2021-05-06 08:23:38,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:38,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472069399] [2021-05-06 08:23:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:38,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:38,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876036553] [2021-05-06 08:23:38,592 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 08:23:38,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:38,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:38,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:38,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:38,848 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 08:23:38,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:38,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472069399] [2021-05-06 08:23:38,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:38,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876036553] [2021-05-06 08:23:38,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876036553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:38,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:38,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:38,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658786120] [2021-05-06 08:23:38,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:38,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:38,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:38,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:38,849 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 08:23:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:39,040 INFO L93 Difference]: Finished difference Result 349 states and 462 transitions. [2021-05-06 08:23:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:23:39,045 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 08:23:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:39,046 INFO L225 Difference]: With dead ends: 349 [2021-05-06 08:23:39,046 INFO L226 Difference]: Without dead ends: 349 [2021-05-06 08:23:39,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:23:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-06 08:23:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 336. [2021-05-06 08:23:39,052 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 08:23:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 447 transitions. [2021-05-06 08:23:39,053 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 447 transitions. Word has length 95 [2021-05-06 08:23:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:39,053 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 447 transitions. [2021-05-06 08:23:39,053 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 08:23:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 447 transitions. [2021-05-06 08:23:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:23:39,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:39,055 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 08:23:39,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:23:39,259 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 4 times [2021-05-06 08:23:39,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:39,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435520658] [2021-05-06 08:23:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:39,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:39,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157567534] [2021-05-06 08:23:39,264 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 08:23:39,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:39,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:39,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:39,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:39,553 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 08:23:39,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:39,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435520658] [2021-05-06 08:23:39,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:39,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157567534] [2021-05-06 08:23:39,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157567534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:39,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:39,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:39,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97878095] [2021-05-06 08:23:39,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:39,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:39,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:39,555 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 08:23:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:39,771 INFO L93 Difference]: Finished difference Result 352 states and 465 transitions. [2021-05-06 08:23:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:23:39,772 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 08:23:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:39,773 INFO L225 Difference]: With dead ends: 352 [2021-05-06 08:23:39,773 INFO L226 Difference]: Without dead ends: 352 [2021-05-06 08:23:39,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:23:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-06 08:23:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2021-05-06 08:23:39,778 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 08:23:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 457 transitions. [2021-05-06 08:23:39,779 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 457 transitions. Word has length 97 [2021-05-06 08:23:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:39,779 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 457 transitions. [2021-05-06 08:23:39,780 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 08:23:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 457 transitions. [2021-05-06 08:23:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:23:39,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:39,781 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 08:23:39,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:23:39,997 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1153601599, now seen corresponding path program 4 times [2021-05-06 08:23:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:39,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702099255] [2021-05-06 08:23:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:40,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:40,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045925462] [2021-05-06 08:23:40,004 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 08:23:40,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:40,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:40,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:40,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,162 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 08:23:40,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702099255] [2021-05-06 08:23:40,162 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045925462] [2021-05-06 08:23:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045925462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:40,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:40,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:40,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564322145] [2021-05-06 08:23:40,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:40,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:40,163 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 08:23:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:40,194 INFO L93 Difference]: Finished difference Result 397 states and 529 transitions. [2021-05-06 08:23:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:40,194 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 08:23:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:40,196 INFO L225 Difference]: With dead ends: 397 [2021-05-06 08:23:40,196 INFO L226 Difference]: Without dead ends: 362 [2021-05-06 08:23:40,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-06 08:23:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2021-05-06 08:23:40,203 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 08:23:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 468 transitions. [2021-05-06 08:23:40,204 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 468 transitions. Word has length 99 [2021-05-06 08:23:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:40,204 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 468 transitions. [2021-05-06 08:23:40,204 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 08:23:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 468 transitions. [2021-05-06 08:23:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:23:40,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:40,205 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 08:23:40,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:40,406 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:40,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2111868500, now seen corresponding path program 5 times [2021-05-06 08:23:40,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:40,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083122179] [2021-05-06 08:23:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:40,410 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:40,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263989657] [2021-05-06 08:23:40,411 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 08:23:40,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:23:40,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:40,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:40,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:40,670 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 08:23:40,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:40,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083122179] [2021-05-06 08:23:40,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:40,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263989657] [2021-05-06 08:23:40,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263989657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:40,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:40,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:40,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981656234] [2021-05-06 08:23:40,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:40,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:40,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:40,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:40,672 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 08:23:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:40,848 INFO L93 Difference]: Finished difference Result 364 states and 480 transitions. [2021-05-06 08:23:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:23:40,848 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 08:23:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:40,850 INFO L225 Difference]: With dead ends: 364 [2021-05-06 08:23:40,850 INFO L226 Difference]: Without dead ends: 364 [2021-05-06 08:23:40,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:23:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-06 08:23:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2021-05-06 08:23:40,855 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 08:23:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 480 transitions. [2021-05-06 08:23:40,856 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 480 transitions. Word has length 99 [2021-05-06 08:23:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:40,856 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 480 transitions. [2021-05-06 08:23:40,856 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 08:23:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 480 transitions. [2021-05-06 08:23:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 08:23:40,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:40,857 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 08:23:41,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:41,062 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 3 times [2021-05-06 08:23:41,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:41,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510375325] [2021-05-06 08:23:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:41,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:41,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979131597] [2021-05-06 08:23:41,066 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 08:23:41,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:23:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:41,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:23:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:41,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,425 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 08:23:41,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510375325] [2021-05-06 08:23:41,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979131597] [2021-05-06 08:23:41,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979131597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:41,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:41,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:23:41,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127180184] [2021-05-06 08:23:41,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:23:41,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:41,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:23:41,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:41,427 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 08:23:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:41,658 INFO L93 Difference]: Finished difference Result 402 states and 531 transitions. [2021-05-06 08:23:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:23:41,659 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 08:23:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:41,660 INFO L225 Difference]: With dead ends: 402 [2021-05-06 08:23:41,660 INFO L226 Difference]: Without dead ends: 396 [2021-05-06 08:23:41,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:23:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-05-06 08:23:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 377. [2021-05-06 08:23:41,666 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 08:23:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 501 transitions. [2021-05-06 08:23:41,667 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 501 transitions. Word has length 103 [2021-05-06 08:23:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:41,667 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 501 transitions. [2021-05-06 08:23:41,668 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 08:23:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 501 transitions. [2021-05-06 08:23:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:23:41,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:41,669 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 08:23:41,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:23:41,885 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1970962975, now seen corresponding path program 5 times [2021-05-06 08:23:41,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:41,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088735773] [2021-05-06 08:23:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:41,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:41,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916592441] [2021-05-06 08:23:41,890 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 08:23:41,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:23:41,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:41,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,110 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 08:23:42,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:42,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088735773] [2021-05-06 08:23:42,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:42,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916592441] [2021-05-06 08:23:42,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916592441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:42,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:42,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:42,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725495650] [2021-05-06 08:23:42,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:42,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:42,111 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 08:23:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:42,205 INFO L93 Difference]: Finished difference Result 588 states and 816 transitions. [2021-05-06 08:23:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:23:42,206 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 08:23:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:42,208 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:23:42,208 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 08:23:42,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 08:23:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 504. [2021-05-06 08:23:42,220 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 08:23:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 695 transitions. [2021-05-06 08:23:42,222 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 695 transitions. Word has length 105 [2021-05-06 08:23:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:42,222 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 695 transitions. [2021-05-06 08:23:42,222 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 08:23:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 695 transitions. [2021-05-06 08:23:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:23:42,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:42,223 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 08:23:42,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:42,437 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 124314395, now seen corresponding path program 6 times [2021-05-06 08:23:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:42,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424025736] [2021-05-06 08:23:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:42,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:42,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75500387] [2021-05-06 08:23:42,441 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 08:23:42,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:23:42,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:42,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:23:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:42,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,856 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 08:23:42,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:42,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424025736] [2021-05-06 08:23:42,857 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:42,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75500387] [2021-05-06 08:23:42,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75500387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:42,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:42,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:23:42,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480065462] [2021-05-06 08:23:42,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:23:42,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:23:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:42,858 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 08:23:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:43,093 INFO L93 Difference]: Finished difference Result 532 states and 727 transitions. [2021-05-06 08:23:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:23:43,094 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 08:23:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:43,096 INFO L225 Difference]: With dead ends: 532 [2021-05-06 08:23:43,096 INFO L226 Difference]: Without dead ends: 532 [2021-05-06 08:23:43,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:23:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-06 08:23:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 522. [2021-05-06 08:23:43,104 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 08:23:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 717 transitions. [2021-05-06 08:23:43,105 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 717 transitions. Word has length 105 [2021-05-06 08:23:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:43,105 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 717 transitions. [2021-05-06 08:23:43,105 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 08:23:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 717 transitions. [2021-05-06 08:23:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:23:43,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:43,107 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 08:23:43,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:23:43,312 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash 786170747, now seen corresponding path program 6 times [2021-05-06 08:23:43,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:43,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463620963] [2021-05-06 08:23:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:43,316 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:43,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007617192] [2021-05-06 08:23:43,316 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 08:23:43,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:23:43,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:43,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:23:43,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:43,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,756 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 08:23:43,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:43,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463620963] [2021-05-06 08:23:43,756 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:43,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007617192] [2021-05-06 08:23:43,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007617192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:43,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:43,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:23:43,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323383234] [2021-05-06 08:23:43,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:23:43,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:23:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:43,759 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 08:23:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:43,984 INFO L93 Difference]: Finished difference Result 538 states and 733 transitions. [2021-05-06 08:23:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 08:23:43,985 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 08:23:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:43,986 INFO L225 Difference]: With dead ends: 538 [2021-05-06 08:23:43,986 INFO L226 Difference]: Without dead ends: 538 [2021-05-06 08:23:43,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:23:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-05-06 08:23:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-05-06 08:23:43,995 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 08:23:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 733 transitions. [2021-05-06 08:23:43,996 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 733 transitions. Word has length 107 [2021-05-06 08:23:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:43,997 INFO L480 AbstractCegarLoop]: Abstraction has 538 states and 733 transitions. [2021-05-06 08:23:43,997 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 08:23:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 733 transitions. [2021-05-06 08:23:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:23:43,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:43,998 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 08:23:44,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:44,203 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:44,203 INFO L82 PathProgramCache]: Analyzing trace with hash 69261278, now seen corresponding path program 4 times [2021-05-06 08:23:44,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:44,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788653065] [2021-05-06 08:23:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:44,208 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:44,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185279576] [2021-05-06 08:23:44,208 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 08:23:44,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:44,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:23:44,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:44,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,500 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 08:23:44,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:44,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788653065] [2021-05-06 08:23:44,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:44,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185279576] [2021-05-06 08:23:44,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185279576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:44,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:44,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:23:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814697484] [2021-05-06 08:23:44,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:23:44,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:44,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:23:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:44,501 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 08:23:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:44,754 INFO L93 Difference]: Finished difference Result 588 states and 803 transitions. [2021-05-06 08:23:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 08:23:44,754 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 08:23:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:44,756 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:23:44,756 INFO L226 Difference]: Without dead ends: 582 [2021-05-06 08:23:44,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:23:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-05-06 08:23:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 560. [2021-05-06 08:23:44,765 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 08:23:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2021-05-06 08:23:44,766 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 111 [2021-05-06 08:23:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:44,767 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2021-05-06 08:23:44,767 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 08:23:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2021-05-06 08:23:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:23:44,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:44,768 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 08:23:44,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 08:23:44,985 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2040709626, now seen corresponding path program 7 times [2021-05-06 08:23:44,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:44,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127392045] [2021-05-06 08:23:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:44,990 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:44,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040754283] [2021-05-06 08:23:44,990 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 08:23:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:45,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:45,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:45,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,222 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 08:23:45,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:45,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127392045] [2021-05-06 08:23:45,223 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:45,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040754283] [2021-05-06 08:23:45,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040754283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:45,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:45,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:45,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994244858] [2021-05-06 08:23:45,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:45,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:45,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:45,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:45,224 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 08:23:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:45,391 INFO L93 Difference]: Finished difference Result 711 states and 989 transitions. [2021-05-06 08:23:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:45,392 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 08:23:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:45,394 INFO L225 Difference]: With dead ends: 711 [2021-05-06 08:23:45,394 INFO L226 Difference]: Without dead ends: 711 [2021-05-06 08:23:45,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-05-06 08:23:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 560. [2021-05-06 08:23:45,404 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 08:23:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2021-05-06 08:23:45,405 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 113 [2021-05-06 08:23:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:45,406 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2021-05-06 08:23:45,406 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 08:23:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2021-05-06 08:23:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:23:45,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:45,407 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 08:23:45,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 08:23:45,625 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash 407609090, now seen corresponding path program 8 times [2021-05-06 08:23:45,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:45,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518017717] [2021-05-06 08:23:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:45,630 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:45,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511080838] [2021-05-06 08:23:45,630 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 08:23:45,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:45,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:23:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:45,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,896 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 08:23:45,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:45,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518017717] [2021-05-06 08:23:45,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:45,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511080838] [2021-05-06 08:23:45,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511080838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:45,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:45,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:23:45,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227341071] [2021-05-06 08:23:45,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:23:45,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:45,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:23:45,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:45,897 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 08:23:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:46,161 INFO L93 Difference]: Finished difference Result 588 states and 800 transitions. [2021-05-06 08:23:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:23:46,165 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 08:23:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:46,167 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:23:46,167 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 08:23:46,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:23:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 08:23:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 578. [2021-05-06 08:23:46,178 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 08:23:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 790 transitions. [2021-05-06 08:23:46,179 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 790 transitions. Word has length 113 [2021-05-06 08:23:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:46,179 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 790 transitions. [2021-05-06 08:23:46,180 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 08:23:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 790 transitions. [2021-05-06 08:23:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:23:46,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:46,181 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 08:23:46,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:23:46,382 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash -87692013, now seen corresponding path program 7 times [2021-05-06 08:23:46,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:46,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881350918] [2021-05-06 08:23:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:46,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:46,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957802051] [2021-05-06 08:23:46,386 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 08:23:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:46,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:23:46,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:46,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,649 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 08:23:46,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881350918] [2021-05-06 08:23:46,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957802051] [2021-05-06 08:23:46,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957802051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:46,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:46,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:23:46,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870668265] [2021-05-06 08:23:46,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:23:46,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:46,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:23:46,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:46,650 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 08:23:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:46,897 INFO L93 Difference]: Finished difference Result 594 states and 806 transitions. [2021-05-06 08:23:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 08:23:46,897 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 08:23:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:46,899 INFO L225 Difference]: With dead ends: 594 [2021-05-06 08:23:46,899 INFO L226 Difference]: Without dead ends: 594 [2021-05-06 08:23:46,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:23:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-05-06 08:23:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-05-06 08:23:46,908 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 08:23:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 806 transitions. [2021-05-06 08:23:46,909 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 806 transitions. Word has length 115 [2021-05-06 08:23:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:46,909 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 806 transitions. [2021-05-06 08:23:46,909 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 08:23:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 806 transitions. [2021-05-06 08:23:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-06 08:23:46,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:46,911 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 08:23:47,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:23:47,125 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1284164229, now seen corresponding path program 5 times [2021-05-06 08:23:47,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:47,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970586163] [2021-05-06 08:23:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:47,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:47,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720780971] [2021-05-06 08:23:47,129 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 08:23:47,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-06 08:23:47,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:47,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:23:47,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:47,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:47,437 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 08:23:47,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:47,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970586163] [2021-05-06 08:23:47,438 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:47,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720780971] [2021-05-06 08:23:47,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720780971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:47,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:47,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:23:47,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964451846] [2021-05-06 08:23:47,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:23:47,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:23:47,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:47,439 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 08:23:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:47,751 INFO L93 Difference]: Finished difference Result 644 states and 876 transitions. [2021-05-06 08:23:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 08:23:47,751 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 08:23:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:47,755 INFO L225 Difference]: With dead ends: 644 [2021-05-06 08:23:47,755 INFO L226 Difference]: Without dead ends: 638 [2021-05-06 08:23:47,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:23:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-06 08:23:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 616. [2021-05-06 08:23:47,763 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 08:23:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 841 transitions. [2021-05-06 08:23:47,765 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 841 transitions. Word has length 119 [2021-05-06 08:23:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:47,765 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 841 transitions. [2021-05-06 08:23:47,766 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 08:23:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 841 transitions. [2021-05-06 08:23:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 08:23:47,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:47,767 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 08:23:47,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:23:47,981 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash -301759511, now seen corresponding path program 9 times [2021-05-06 08:23:47,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:47,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980021776] [2021-05-06 08:23:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:47,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:47,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800655589] [2021-05-06 08:23:47,986 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 08:23:48,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-06 08:23:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:23:48,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:48,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:48,500 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 08:23:48,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:48,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980021776] [2021-05-06 08:23:48,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:48,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800655589] [2021-05-06 08:23:48,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800655589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:48,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:48,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:23:48,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011204996] [2021-05-06 08:23:48,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:23:48,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:23:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:48,502 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 08:23:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:48,789 INFO L93 Difference]: Finished difference Result 644 states and 873 transitions. [2021-05-06 08:23:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:23:48,789 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 08:23:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:48,791 INFO L225 Difference]: With dead ends: 644 [2021-05-06 08:23:48,791 INFO L226 Difference]: Without dead ends: 644 [2021-05-06 08:23:48,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:23:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-05-06 08:23:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2021-05-06 08:23:48,799 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 08:23:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 863 transitions. [2021-05-06 08:23:48,800 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 863 transitions. Word has length 121 [2021-05-06 08:23:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:48,801 INFO L480 AbstractCegarLoop]: Abstraction has 634 states and 863 transitions. [2021-05-06 08:23:48,801 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 08:23:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 863 transitions. [2021-05-06 08:23:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 08:23:48,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:48,802 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 08:23:49,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:49,008 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1231932614, now seen corresponding path program 8 times [2021-05-06 08:23:49,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:49,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880873632] [2021-05-06 08:23:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:49,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:49,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192294690] [2021-05-06 08:23:49,012 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 08:23:49,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:49,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:49,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:23:49,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:49,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:49,315 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 08:23:49,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:49,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880873632] [2021-05-06 08:23:49,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:49,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192294690] [2021-05-06 08:23:49,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192294690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:49,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:49,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:23:49,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313845235] [2021-05-06 08:23:49,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:23:49,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:49,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:23:49,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:49,316 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 08:23:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:49,683 INFO L93 Difference]: Finished difference Result 650 states and 879 transitions. [2021-05-06 08:23:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 08:23:49,684 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 08:23:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:49,686 INFO L225 Difference]: With dead ends: 650 [2021-05-06 08:23:49,686 INFO L226 Difference]: Without dead ends: 650 [2021-05-06 08:23:49,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:23:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-05-06 08:23:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-05-06 08:23:49,694 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 08:23:49,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 879 transitions. [2021-05-06 08:23:49,695 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 879 transitions. Word has length 123 [2021-05-06 08:23:49,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:49,695 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 879 transitions. [2021-05-06 08:23:49,695 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 08:23:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 879 transitions. [2021-05-06 08:23:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:23:49,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:49,697 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 08:23:49,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:49,902 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2054740436, now seen corresponding path program 6 times [2021-05-06 08:23:49,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:49,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316835459] [2021-05-06 08:23:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:49,907 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:49,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444082271] [2021-05-06 08:23:49,907 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 08:23:50,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-06 08:23:50,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:23:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:50,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:50,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,111 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 08:23:51,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:51,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316835459] [2021-05-06 08:23:51,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:51,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444082271] [2021-05-06 08:23:51,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444082271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:51,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:51,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:23:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164761486] [2021-05-06 08:23:51,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:23:51,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:51,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:23:51,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:51,113 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 08:23:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:51,439 INFO L93 Difference]: Finished difference Result 700 states and 949 transitions. [2021-05-06 08:23:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 08:23:51,439 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 08:23:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:51,441 INFO L225 Difference]: With dead ends: 700 [2021-05-06 08:23:51,441 INFO L226 Difference]: Without dead ends: 694 [2021-05-06 08:23:51,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=255, Invalid=447, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:23:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-05-06 08:23:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 672. [2021-05-06 08:23:51,450 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 08:23:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 914 transitions. [2021-05-06 08:23:51,451 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 914 transitions. Word has length 127 [2021-05-06 08:23:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:51,451 INFO L480 AbstractCegarLoop]: Abstraction has 672 states and 914 transitions. [2021-05-06 08:23:51,451 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 08:23:51,451 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 914 transitions. [2021-05-06 08:23:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 08:23:51,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:51,453 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 08:23:51,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:51,659 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash 462807165, now seen corresponding path program 10 times [2021-05-06 08:23:51,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:51,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582036507] [2021-05-06 08:23:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:51,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:51,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832190370] [2021-05-06 08:23:51,663 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 08:23:51,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:51,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:23:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:51,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:51,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:52,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:53,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:53,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:53,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:53,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:53,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,776 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-06 08:23:54,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:54,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:55,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:55,184 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 08:23:55,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:55,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582036507] [2021-05-06 08:23:55,185 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:55,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832190370] [2021-05-06 08:23:55,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832190370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:55,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:55,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:23:55,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004053221] [2021-05-06 08:23:55,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:23:55,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:55,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:23:55,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:23:55,186 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)