/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_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:23:30,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:23:30,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:23:30,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:23:30,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:23:30,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:23:30,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:23:30,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:23:30,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:23:30,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:23:30,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:23:30,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:23:30,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:23:30,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:23:30,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:23:30,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:23:30,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:23:30,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:23:30,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:23:30,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:23:30,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:23:30,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:23:30,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:23:30,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:23:30,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:23:30,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:23:30,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:23:30,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:23:30,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:23:30,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:23:30,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:23:30,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:23:30,842 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:23:30,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:23:30,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:23:30,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:23:30,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:23:30,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:23:30,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:23:30,843 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:23:30,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:23:30,844 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:23:30,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:23:30,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:23:30,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:23:30,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:23:30,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:23:30,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:23:30,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:23:30,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:23:30,846 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:23:30,846 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:23:31,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:23:31,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:23:31,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:23:31,199 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:23:31,200 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:23:31,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2021-05-06 08:23:31,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f554e68/74f9fc5139b64476a3fcb69673244961/FLAG2e112a15a [2021-05-06 08:23:31,705 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:23:31,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2021-05-06 08:23:31,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f554e68/74f9fc5139b64476a3fcb69673244961/FLAG2e112a15a [2021-05-06 08:23:32,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f554e68/74f9fc5139b64476a3fcb69673244961 [2021-05-06 08:23:32,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:23:32,129 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:23:32,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:23:32,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:23:32,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:23:32,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eac0780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32, skipping insertion in model container [2021-05-06 08:23:32,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:23:32,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:23:32,283 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_unwindbound5.c[535,548] [2021-05-06 08:23:32,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:23:32,306 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:23:32,316 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_unwindbound5.c[535,548] [2021-05-06 08:23:32,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:23:32,335 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:23:32,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32 WrapperNode [2021-05-06 08:23:32,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:23:32,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:23:32,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:23:32,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:23:32,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:23:32,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:23:32,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:23:32,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:23:32,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (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 08:23:32,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:23:32,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:23:32,492 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:23:32,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:23:32,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:23:32,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:23:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:23:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:23:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:23:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:23:32,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:23:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:23:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:23:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:23:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:23:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:23:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:23:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:23:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:23:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:23:32,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:23:32,765 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:23:32,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:32 BoogieIcfgContainer [2021-05-06 08:23:32,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:23:32,767 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:23:32,767 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:23:32,768 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:23:32,770 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:32" (1/1) ... [2021-05-06 08:23:32,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:23:32 BasicIcfg [2021-05-06 08:23:32,783 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:23:32,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:23:32,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:23:32,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:23:32,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:23:32" (1/4) ... [2021-05-06 08:23:32,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4549c9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:23:32, skipping insertion in model container [2021-05-06 08:23:32,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:23:32" (2/4) ... [2021-05-06 08:23:32,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4549c9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:23:32, skipping insertion in model container [2021-05-06 08:23:32,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:23:32" (3/4) ... [2021-05-06 08:23:32,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4549c9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:23:32, skipping insertion in model container [2021-05-06 08:23:32,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:23:32" (4/4) ... [2021-05-06 08:23:32,798 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound5.cJordan [2021-05-06 08:23:32,802 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:23:32,821 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:23:32,837 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:23:32,853 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:23:32,853 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:23:32,853 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:23:32,853 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:23:32,853 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:23:32,853 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:23:32,853 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:23:32,853 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:23:32,864 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 08:23:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:23:32,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:32,871 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 08:23:32,871 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:32,877 INFO L82 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2021-05-06 08:23:32,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:32,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582460566] [2021-05-06 08:23:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:32,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:32,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67661401] [2021-05-06 08:23:32,984 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 08:23:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:33,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:23:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:33,183 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 08:23:33,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582460566] [2021-05-06 08:23:33,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67661401] [2021-05-06 08:23:33,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67661401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:33,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:33,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:23:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070053145] [2021-05-06 08:23:33,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:23:33,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:23:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:23:33,200 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 08:23:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:33,211 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-06 08:23:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:23:33,212 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 08:23:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:33,217 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:23:33,217 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:23:33,218 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 08:23:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:23:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:23:33,243 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 08:23:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:23:33,245 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-06 08:23:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:33,245 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:23:33,245 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 08:23:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:23:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:23:33,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:33,247 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 08:23:33,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:23:33,461 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2021-05-06 08:23:33,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:33,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521269070] [2021-05-06 08:23:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:33,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:33,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704581646] [2021-05-06 08:23:33,483 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 08:23:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:33,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:23:33,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:33,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:33,722 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 08:23:33,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:33,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521269070] [2021-05-06 08:23:33,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:33,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704581646] [2021-05-06 08:23:33,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704581646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:33,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:33,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:33,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929673790] [2021-05-06 08:23:33,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:33,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:33,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:33,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:33,726 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 08:23:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:33,744 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-05-06 08:23:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:33,745 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 08:23:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:33,746 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:23:33,746 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:23:33,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:23:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:23:33,751 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 08:23:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 08:23:33,752 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-06 08:23:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:33,753 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 08:23:33,754 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 08:23:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 08:23:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:23:33,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:33,754 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 08:23:33,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:33,971 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:33,971 INFO L82 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2021-05-06 08:23:33,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:33,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949615341] [2021-05-06 08:23:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:33,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:33,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791318191] [2021-05-06 08:23:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:23:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:34,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:34,257 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 08:23:34,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:34,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949615341] [2021-05-06 08:23:34,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:34,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791318191] [2021-05-06 08:23:34,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791318191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:34,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:34,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:23:34,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804049985] [2021-05-06 08:23:34,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:23:34,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:34,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:23:34,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:34,260 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 08:23:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:41,398 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-06 08:23:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:41,398 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 08:23:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:41,399 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:23:41,399 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:23:41,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:23:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:23:41,405 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 08:23:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-06 08:23:41,407 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-06 08:23:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:41,407 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-06 08:23:41,407 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 08:23:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-06 08:23:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:23:41,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:41,409 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 08:23:41,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:41,630 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2021-05-06 08:23:41,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:41,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963442502] [2021-05-06 08:23:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:41,643 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:41,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314655681] [2021-05-06 08:23:41,644 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 08:23:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:23:41,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:41,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:41,846 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 08:23:41,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:41,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963442502] [2021-05-06 08:23:41,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:41,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314655681] [2021-05-06 08:23:41,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314655681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:41,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:41,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:41,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383962748] [2021-05-06 08:23:41,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:41,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:41,849 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 08:23:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:41,958 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-05-06 08:23:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:23:41,959 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 08:23:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:41,960 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:23:41,960 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 08:23:41,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 08:23:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 08:23:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 6 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 08:23:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-05-06 08:23:41,968 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2021-05-06 08:23:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:41,968 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-05-06 08:23:41,968 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 08:23:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-05-06 08:23:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:23:41,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:41,970 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 08:23:42,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:42,185 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:42,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2021-05-06 08:23:42,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:42,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599896065] [2021-05-06 08:23:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:42,194 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:42,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147488539] [2021-05-06 08:23:42,194 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 08:23:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:42,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:23:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:42,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,354 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 08:23:42,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:42,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599896065] [2021-05-06 08:23:42,355 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:42,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147488539] [2021-05-06 08:23:42,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147488539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:42,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:42,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:23:42,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103652885] [2021-05-06 08:23:42,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:23:42,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:42,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:23:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:42,356 INFO L87 Difference]: Start difference. First operand 52 states and 66 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 08:23:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:42,396 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-06 08:23:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:42,397 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 08:23:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:42,399 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:23:42,399 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:23:42,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:23:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 08:23:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:23:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-06 08:23:42,415 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 35 [2021-05-06 08:23:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:42,416 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-06 08:23:42,416 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 08:23:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-06 08:23:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:23:42,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:42,417 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 08:23:42,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:42,618 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2021-05-06 08:23:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:42,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326923214] [2021-05-06 08:23:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:42,628 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:42,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341412217] [2021-05-06 08:23:42,628 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 08:23:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:42,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:42,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,754 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 08:23:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:42,801 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 08:23:42,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:42,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326923214] [2021-05-06 08:23:42,802 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:42,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341412217] [2021-05-06 08:23:42,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341412217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:42,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:42,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:42,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377739888] [2021-05-06 08:23:42,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:42,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:42,805 INFO L87 Difference]: Start difference. First operand 60 states and 74 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 08:23:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:42,857 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2021-05-06 08:23:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:23:42,858 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 08:23:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:42,864 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:23:42,864 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:23:42,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:23:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:23:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:23:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-05-06 08:23:42,876 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 41 [2021-05-06 08:23:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:42,876 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-05-06 08:23:42,876 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 08:23:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-05-06 08:23:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:23:42,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:42,878 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 08:23:43,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:43,092 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2021-05-06 08:23:43,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:43,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429148687] [2021-05-06 08:23:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:43,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:43,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188485490] [2021-05-06 08:23:43,109 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 08:23:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:43,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:43,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,339 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 08:23:43,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:43,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429148687] [2021-05-06 08:23:43,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:43,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188485490] [2021-05-06 08:23:43,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188485490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:43,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:43,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638715317] [2021-05-06 08:23:43,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:43,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:43,341 INFO L87 Difference]: Start difference. First operand 68 states and 83 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 08:23:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:43,391 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2021-05-06 08:23:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:23:43,391 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 08:23:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:43,392 INFO L225 Difference]: With dead ends: 70 [2021-05-06 08:23:43,392 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 08:23:43,392 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 08:23:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 08:23:43,396 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:23:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2021-05-06 08:23:43,397 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 43 [2021-05-06 08:23:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:43,398 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2021-05-06 08:23:43,398 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 08:23:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2021-05-06 08:23:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:23:43,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:43,399 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 08:23:43,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:43,613 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:43,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:43,614 INFO L82 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2021-05-06 08:23:43,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:43,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465452755] [2021-05-06 08:23:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:43,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:43,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367213227] [2021-05-06 08:23:43,623 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 08:23:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:43,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:43,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:43,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:43,777 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 08:23:43,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:43,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465452755] [2021-05-06 08:23:43,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367213227] [2021-05-06 08:23:43,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367213227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:43,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:43,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:43,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005161632] [2021-05-06 08:23:43,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:43,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:43,780 INFO L87 Difference]: Start difference. First operand 70 states and 85 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 08:23:43,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:43,817 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-05-06 08:23:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:43,817 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 08:23:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:43,820 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:23:43,820 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:23:43,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:23:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-05-06 08:23:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 20 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:23:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2021-05-06 08:23:43,836 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 47 [2021-05-06 08:23:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:43,837 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2021-05-06 08:23:43,838 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 08:23:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2021-05-06 08:23:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:23:43,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:43,841 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 08:23:44,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:23:44,053 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2021-05-06 08:23:44,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:44,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094440220] [2021-05-06 08:23:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:44,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:44,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394700222] [2021-05-06 08:23:44,062 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 08:23:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:44,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,247 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 08:23:44,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:44,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094440220] [2021-05-06 08:23:44,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:44,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394700222] [2021-05-06 08:23:44,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394700222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:44,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:44,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:23:44,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361086945] [2021-05-06 08:23:44,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:23:44,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:44,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:23:44,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:44,249 INFO L87 Difference]: Start difference. First operand 98 states and 128 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 08:23:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:44,321 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2021-05-06 08:23:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:23:44,321 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 08:23:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:44,323 INFO L225 Difference]: With dead ends: 115 [2021-05-06 08:23:44,323 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 08:23:44,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:44,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 08:23:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-06 08:23:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 22 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:23:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2021-05-06 08:23:44,329 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 49 [2021-05-06 08:23:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:44,329 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2021-05-06 08:23:44,329 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 08:23:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2021-05-06 08:23:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:23:44,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:44,330 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 08:23:44,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:44,554 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:44,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1993056519, now seen corresponding path program 2 times [2021-05-06 08:23:44,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:44,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419093886] [2021-05-06 08:23:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:44,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:44,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044813936] [2021-05-06 08:23:44,566 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 08:23:44,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:44,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:44,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:44,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:44,789 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 08:23:44,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:44,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419093886] [2021-05-06 08:23:44,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:44,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044813936] [2021-05-06 08:23:44,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044813936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:44,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:44,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:23:44,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252763896] [2021-05-06 08:23:44,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:23:44,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:23:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:44,791 INFO L87 Difference]: Start difference. First operand 114 states and 145 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 08:23:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:44,852 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2021-05-06 08:23:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:44,852 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 08:23:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:44,853 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:23:44,853 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:23:44,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:23:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-06 08:23:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 85 states have internal predecessors, (105), 22 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:23:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2021-05-06 08:23:44,859 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 51 [2021-05-06 08:23:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:44,860 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2021-05-06 08:23:44,860 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 08:23:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2021-05-06 08:23:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:23:44,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:44,861 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 08:23:45,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:45,077 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2021-05-06 08:23:45,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:45,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345405020] [2021-05-06 08:23:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:45,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:45,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713033821] [2021-05-06 08:23:45,086 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 08:23:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:45,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:45,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,304 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 08:23:45,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:45,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345405020] [2021-05-06 08:23:45,304 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713033821] [2021-05-06 08:23:45,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713033821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:45,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:45,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:45,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892912559] [2021-05-06 08:23:45,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:45,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:45,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:45,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:45,306 INFO L87 Difference]: Start difference. First operand 116 states and 147 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 08:23:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:45,386 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2021-05-06 08:23:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:45,387 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 08:23:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:45,388 INFO L225 Difference]: With dead ends: 137 [2021-05-06 08:23:45,388 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 08:23:45,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 08:23:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-05-06 08:23:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 98 states have internal predecessors, (119), 25 states have call successors, (25), 12 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:23:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2021-05-06 08:23:45,398 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 55 [2021-05-06 08:23:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:45,399 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2021-05-06 08:23:45,399 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 08:23:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2021-05-06 08:23:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 08:23:45,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:45,400 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 08:23:45,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:23:45,624 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__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 -1625914620, now seen corresponding path program 2 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 [896918038] [2021-05-06 08:23:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:45,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:45,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141467743] [2021-05-06 08:23:45,633 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 08:23:45,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:45,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:45,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:45,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [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 08:23:45,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:45,830 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 08:23:45,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:45,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896918038] [2021-05-06 08:23:45,831 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:45,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141467743] [2021-05-06 08:23:45,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141467743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:45,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:45,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:45,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205513099] [2021-05-06 08:23:45,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:45,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:45,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:45,832 INFO L87 Difference]: Start difference. First operand 133 states and 167 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 08:23:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:45,913 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2021-05-06 08:23:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:23:45,914 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 08:23:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:45,915 INFO L225 Difference]: With dead ends: 139 [2021-05-06 08:23:45,915 INFO L226 Difference]: Without dead ends: 139 [2021-05-06 08:23:45,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-06 08:23:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-05-06 08:23:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 102 states have internal predecessors, (125), 25 states have call successors, (25), 12 states have call predecessors, (25), 10 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:23:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 173 transitions. [2021-05-06 08:23:45,921 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 173 transitions. Word has length 57 [2021-05-06 08:23:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:45,922 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 173 transitions. [2021-05-06 08:23:45,922 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 08:23:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 173 transitions. [2021-05-06 08:23:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:23:45,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:45,923 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 08:23:46,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:46,147 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:46,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1635475232, now seen corresponding path program 3 times [2021-05-06 08:23:46,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:46,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511036041] [2021-05-06 08:23:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:46,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:46,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038837404] [2021-05-06 08:23:46,154 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 08:23:46,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 08:23:46,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:46,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:46,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:46,494 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 08:23:46,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:46,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511036041] [2021-05-06 08:23:46,494 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:46,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038837404] [2021-05-06 08:23:46,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038837404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:46,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:46,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:46,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837393041] [2021-05-06 08:23:46,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:46,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:46,498 INFO L87 Difference]: Start difference. First operand 138 states and 173 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 08:23:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:46,589 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2021-05-06 08:23:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:23:46,589 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 08:23:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:46,592 INFO L225 Difference]: With dead ends: 140 [2021-05-06 08:23:46,592 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 08:23:46,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 08:23:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-05-06 08:23:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 25 states have call successors, (25), 12 states have call predecessors, (25), 10 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:23:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2021-05-06 08:23:46,599 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 59 [2021-05-06 08:23:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:46,599 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2021-05-06 08:23:46,599 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 08:23:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2021-05-06 08:23:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:23:46,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:46,600 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 08:23:46,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:23:46,800 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1972951801, now seen corresponding path program 2 times [2021-05-06 08:23:46,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:46,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666404096] [2021-05-06 08:23:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:46,808 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:46,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688256270] [2021-05-06 08:23:46,808 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 08:23:46,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:46,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 08:23:46,875 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:23:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:23:46,903 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:23:46,959 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:23:46,959 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:23:47,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:47,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:23:47 BasicIcfg [2021-05-06 08:23:47,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:23:47,214 INFO L168 Benchmark]: Toolchain (without parser) took 15085.70 ms. Allocated memory was 173.0 MB in the beginning and 207.6 MB in the end (delta: 34.6 MB). Free memory was 139.4 MB in the beginning and 168.5 MB in the end (delta: -29.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:47,214 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 173.0 MB. Free memory is still 155.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:23:47,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.44 ms. Allocated memory is still 173.0 MB. Free memory was 139.2 MB in the beginning and 129.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:47,214 INFO L168 Benchmark]: Boogie Preprocessor took 37.93 ms. Allocated memory is still 173.0 MB. Free memory was 129.1 MB in the beginning and 127.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:47,214 INFO L168 Benchmark]: RCFGBuilder took 380.81 ms. Allocated memory is still 173.0 MB. Free memory was 127.5 MB in the beginning and 141.1 MB in the end (delta: -13.5 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:47,214 INFO L168 Benchmark]: IcfgTransformer took 16.11 ms. Allocated memory is still 173.0 MB. Free memory was 141.1 MB in the beginning and 139.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:47,215 INFO L168 Benchmark]: TraceAbstraction took 14429.18 ms. Allocated memory was 173.0 MB in the beginning and 207.6 MB in the end (delta: 34.6 MB). Free memory was 139.3 MB in the beginning and 168.5 MB in the end (delta: -29.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:47,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 173.0 MB. Free memory is still 155.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 203.44 ms. Allocated memory is still 173.0 MB. Free memory was 139.2 MB in the beginning and 129.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.93 ms. Allocated memory is still 173.0 MB. Free memory was 129.1 MB in the beginning and 127.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 380.81 ms. Allocated memory is still 173.0 MB. Free memory was 127.5 MB in the beginning and 141.1 MB in the end (delta: -13.5 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.11 ms. Allocated memory is still 173.0 MB. Free memory was 141.1 MB in the beginning and 139.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14429.18 ms. Allocated memory was 173.0 MB in the beginning and 207.6 MB in the end (delta: 34.6 MB). Free memory was 139.3 MB in the beginning and 168.5 MB in the end (delta: -29.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=7, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=3, counter=0, R=0] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=3, counter=0, R=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=3, counter=0, r=-3, R=0, u=1, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=3, counter=1, counter++=0, R=0, r=-3, u=1, v=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=3, counter=1, R=0, r=-3, u=1, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=3, counter=1, r=-3, R=0, u=1, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=3, counter=2, counter++=1, r=-3, R=0, u=1, v=1] [L39] COND TRUE counter++<5 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=3, counter=2, r=-3, R=0, u=1, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=3, counter=2, r=-3, R=0, u=1, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=3, counter=3, counter++=2, r=-3, R=0, u=1, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=3, counter=3, R=0, r=-3, u=1, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=3, counter=3, r=-2, R=0, u=3, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=3, counter=4, counter++=3, r=-2, R=0, u=3, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=3, counter=4, r=-2, R=0, u=3, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=3, counter=4, R=0, r=1, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=3, counter=5, counter++=4, R=0, r=1, u=5, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=3, counter=5, R=0, r=1, u=5, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=3, counter=5, R=0, r=1, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=3, counter=6, counter++=5, r=1, R=0, u=5, v=1] [L34] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14322.5ms, OverallIterations: 14, TraceHistogramMax: 6, EmptinessCheckTime: 22.9ms, AutomataDifference: 7901.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 528 SDtfs, 221 SDslu, 1164 SDs, 0 SdLazy, 409 SolverSat, 158 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 7496.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 535 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 372.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=140occurred in iteration=13, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 115.9ms AutomataMinimizationTime, 13 MinimizatonAttempts, 26 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 144.1ms SsaConstructionTime, 580.9ms SatisfiabilityAnalysisTime, 1629.6ms InterpolantComputationTime, 597 NumberOfCodeBlocks, 597 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 521 ConstructedInterpolants, 0 QuantifiedInterpolants, 1363 SizeOfPredicates, 38 NumberOfNonLiveVariables, 2143 ConjunctsInSsa, 116 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 133/282 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...