/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/sqrt1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:53:25,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:53:25,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:53:25,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:53:25,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:53:25,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:53:25,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:53:25,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:53:25,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:53:25,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:53:25,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:53:25,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:53:25,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:53:25,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:53:25,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:53:25,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:53:25,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:53:25,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:53:25,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:53:25,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:53:25,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:53:25,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:53:25,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:53:25,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:53:25,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:53:25,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:53:25,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:53:25,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:53:25,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:53:25,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:53:25,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:53:25,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:53:25,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:53:25,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:53:25,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:53:25,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:53:25,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:53:25,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:53:25,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:53:25,224 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:53:25,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:53:25,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:53:25,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:53:25,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:53:25,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:53:25,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:53:25,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:53:25,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:53:25,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:53:25,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:53:25,226 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:53:25,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:53:25,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:53:25,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:53:25,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:53:25,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:53:25,491 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:53:25,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-05-06 10:53:25,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3420648b6/b73f692b7d1c4cfa8c49802a1b42c2c8/FLAGe005b0333 [2021-05-06 10:53:25,905 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:53:25,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-05-06 10:53:25,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3420648b6/b73f692b7d1c4cfa8c49802a1b42c2c8/FLAGe005b0333 [2021-05-06 10:53:26,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3420648b6/b73f692b7d1c4cfa8c49802a1b42c2c8 [2021-05-06 10:53:26,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:53:26,333 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:53:26,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:53:26,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:53:26,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:53:26,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d948265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26, skipping insertion in model container [2021-05-06 10:53:26,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:53:26,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:53:26,440 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/sqrt1-ll_unwindbound5.c[520,533] [2021-05-06 10:53:26,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:53:26,464 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:53:26,474 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/sqrt1-ll_unwindbound5.c[520,533] [2021-05-06 10:53:26,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:53:26,500 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:53:26,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26 WrapperNode [2021-05-06 10:53:26,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:53:26,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:53:26,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:53:26,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:53:26,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:53:26,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:53:26,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:53:26,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:53:26,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (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 10:53:26,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:53:26,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:53:26,613 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:53:26,613 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:53:26,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:53:26,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:53:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:53:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:53:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:53:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:53:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:53:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:53:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:53:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:53:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:53:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:53:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:53:26,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:53:26,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:53:26,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:53:26,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:53:26,859 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:53:26,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:26 BoogieIcfgContainer [2021-05-06 10:53:26,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:53:26,867 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:53:26,867 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:53:26,868 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:53:26,873 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:26" (1/1) ... [2021-05-06 10:53:26,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:53:26 BasicIcfg [2021-05-06 10:53:26,891 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:53:26,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:53:26,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:53:26,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:53:26,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:53:26" (1/4) ... [2021-05-06 10:53:26,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf48078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:53:26, skipping insertion in model container [2021-05-06 10:53:26,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:26" (2/4) ... [2021-05-06 10:53:26,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf48078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:53:26, skipping insertion in model container [2021-05-06 10:53:26,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:26" (3/4) ... [2021-05-06 10:53:26,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf48078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:53:26, skipping insertion in model container [2021-05-06 10:53:26,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:53:26" (4/4) ... [2021-05-06 10:53:26,897 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound5.cJordan [2021-05-06 10:53:26,901 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:53:26,903 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:53:26,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:53:26,931 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:53:26,931 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:53:26,931 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:53:26,932 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:53:26,932 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:53:26,932 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:53:26,932 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:53:26,932 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:53:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:53:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 10:53:26,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:26,945 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:26,946 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:26,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-06 10:53:26,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:26,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115509668] [2021-05-06 10:53:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:27,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:27,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:27,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115509668] [2021-05-06 10:53:27,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115509668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:27,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:27,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:53:27,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171966794] [2021-05-06 10:53:27,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:53:27,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:27,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:53:27,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:53:27,156 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:27,244 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-06 10:53:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:53:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 10:53:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:27,251 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:53:27,251 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 10:53:27,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:53:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 10:53:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 10:53:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:53:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-06 10:53:27,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-06 10:53:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:27,279 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-06 10:53:27,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-06 10:53:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:53:27,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:27,280 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:27,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:53:27,281 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-06 10:53:27,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:27,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452623520] [2021-05-06 10:53:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:27,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:27,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:27,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452623520] [2021-05-06 10:53:27,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452623520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:27,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:27,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:53:27,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938662787] [2021-05-06 10:53:27,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:27,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:27,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:27,428 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:27,517 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-06 10:53:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:53:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:27,519 INFO L225 Difference]: With dead ends: 23 [2021-05-06 10:53:27,519 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 10:53:27,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 10:53:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 10:53:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:53:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-06 10:53:27,526 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-06 10:53:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:27,527 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-06 10:53:27,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-06 10:53:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:53:27,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:27,528 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:27,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 10:53:27,528 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:27,530 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-06 10:53:27,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:27,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645433014] [2021-05-06 10:53:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:27,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:27,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:27,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645433014] [2021-05-06 10:53:27,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645433014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:27,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:27,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:53:27,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640217801] [2021-05-06 10:53:27,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:27,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:27,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:27,673 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:27,861 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-06 10:53:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:53:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:27,863 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:53:27,863 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:53:27,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:53:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 10:53:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:53:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 10:53:27,869 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 10:53:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:27,869 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 10:53:27,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:27,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 10:53:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:53:27,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:27,870 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:27,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 10:53:27,870 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:27,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2021-05-06 10:53:27,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:27,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596979377] [2021-05-06 10:53:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:27,884 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:27,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246449259] [2021-05-06 10:53:27,885 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 10:53:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:27,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:27,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:28,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:28,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596979377] [2021-05-06 10:53:28,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:28,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246449259] [2021-05-06 10:53:28,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246449259] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:28,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:28,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:53:28,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517758112] [2021-05-06 10:53:28,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:28,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:28,065 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:53:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:28,095 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 10:53:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:53:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 10:53:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:28,097 INFO L225 Difference]: With dead ends: 38 [2021-05-06 10:53:28,097 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:53:28,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:53:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 10:53:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:53:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 10:53:28,101 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2021-05-06 10:53:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:28,101 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 10:53:28,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:53:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 10:53:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:53:28,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:28,102 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:28,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:28,323 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:28,324 INFO L82 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times [2021-05-06 10:53:28,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:28,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602594400] [2021-05-06 10:53:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:28,333 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:28,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643703957] [2021-05-06 10:53:28,333 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 10:53:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:28,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,471 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 10:53:28,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:28,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602594400] [2021-05-06 10:53:28,472 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:28,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643703957] [2021-05-06 10:53:28,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643703957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:28,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:28,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:53:28,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330964235] [2021-05-06 10:53:28,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:28,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:28,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:28,473 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:53:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:28,506 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 10:53:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:53:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:53:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:28,507 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:53:28,507 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 10:53:28,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 10:53:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 10:53:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-06 10:53:28,511 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-06 10:53:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:28,511 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-06 10:53:28,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:53:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-06 10:53:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:53:28,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:28,512 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:28,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:28,731 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2021-05-06 10:53:28,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:28,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133453568] [2021-05-06 10:53:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:28,749 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:28,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544382545] [2021-05-06 10:53:28,750 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 10:53:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:28,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:28,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:28,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:53:28,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:28,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133453568] [2021-05-06 10:53:28,864 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:28,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544382545] [2021-05-06 10:53:28,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544382545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:28,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:28,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:53:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801912712] [2021-05-06 10:53:28,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:28,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:28,865 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:28,907 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-06 10:53:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:28,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 10:53:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:28,908 INFO L225 Difference]: With dead ends: 41 [2021-05-06 10:53:28,908 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 10:53:28,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 10:53:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 10:53:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 10:53:28,920 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2021-05-06 10:53:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:28,921 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 10:53:28,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 10:53:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:53:28,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:28,922 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:29,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:29,137 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2021-05-06 10:53:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:29,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524085546] [2021-05-06 10:53:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:29,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:29,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442985439] [2021-05-06 10:53:29,143 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 10:53:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:29,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:53:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:29,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:53:29,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:29,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524085546] [2021-05-06 10:53:29,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:29,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442985439] [2021-05-06 10:53:29,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442985439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:29,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:29,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567959853] [2021-05-06 10:53:29,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:29,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:29,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:29,256 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:29,309 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-06 10:53:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:29,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 10:53:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:29,316 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:53:29,316 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:53:29,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:53:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 10:53:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:53:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-06 10:53:29,330 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2021-05-06 10:53:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:29,331 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-06 10:53:29,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-06 10:53:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 10:53:29,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:29,331 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:29,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:29,532 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:29,533 INFO L82 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2021-05-06 10:53:29,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:29,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292258492] [2021-05-06 10:53:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:29,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:29,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24296263] [2021-05-06 10:53:29,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:29,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:29,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:29,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:29,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:53:29,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:29,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292258492] [2021-05-06 10:53:29,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:29,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24296263] [2021-05-06 10:53:29,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24296263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:29,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:29,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:29,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363507755] [2021-05-06 10:53:29,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:29,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:29,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:29,694 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:53:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:29,750 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-05-06 10:53:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-06 10:53:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:29,753 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:53:29,753 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 10:53:29,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 10:53:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 10:53:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:53:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-05-06 10:53:29,766 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 35 [2021-05-06 10:53:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:29,766 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-05-06 10:53:29,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:53:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-05-06 10:53:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:53:29,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:29,767 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:29,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:29,969 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash -880778788, now seen corresponding path program 3 times [2021-05-06 10:53:29,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:29,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412043367] [2021-05-06 10:53:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:29,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:29,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204167828] [2021-05-06 10:53:29,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:30,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:53:30,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:30,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:30,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:53:30,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412043367] [2021-05-06 10:53:30,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204167828] [2021-05-06 10:53:30,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204167828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:30,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:30,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:30,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755783120] [2021-05-06 10:53:30,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:30,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:30,086 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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 10:53:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:30,128 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-05-06 10:53:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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 40 [2021-05-06 10:53:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:30,129 INFO L225 Difference]: With dead ends: 60 [2021-05-06 10:53:30,130 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 10:53:30,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 10:53:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 10:53:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-05-06 10:53:30,132 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 40 [2021-05-06 10:53:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:30,133 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-05-06 10:53:30,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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 10:53:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-05-06 10:53:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 10:53:30,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:30,134 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:30,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:30,351 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:30,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2014164963, now seen corresponding path program 2 times [2021-05-06 10:53:30,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:30,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30614430] [2021-05-06 10:53:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:30,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:30,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417309289] [2021-05-06 10:53:30,356 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 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 10:53:30,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:30,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:30,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:53:30,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:30,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:53:30,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:30,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30614430] [2021-05-06 10:53:30,468 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:30,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417309289] [2021-05-06 10:53:30,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417309289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:30,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:30,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:30,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913567687] [2021-05-06 10:53:30,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:30,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:30,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:30,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:30,469 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:53:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:30,502 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-05-06 10:53:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-06 10:53:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:30,503 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:53:30,503 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 10:53:30,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 10:53:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 10:53:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-05-06 10:53:30,513 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 48 [2021-05-06 10:53:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:30,513 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-05-06 10:53:30,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:53:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-05-06 10:53:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 10:53:30,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:30,514 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:30,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:53:30,729 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2015237439, now seen corresponding path program 4 times [2021-05-06 10:53:30,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:30,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974312616] [2021-05-06 10:53:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:30,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:30,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694660696] [2021-05-06 10:53:30,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:30,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:53:30,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:53:30,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:30,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 10:53:30,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:30,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974312616] [2021-05-06 10:53:30,873 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:30,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694660696] [2021-05-06 10:53:30,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694660696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:30,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:30,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:30,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350092517] [2021-05-06 10:53:30,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:30,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:30,874 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 10:53:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:30,932 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-05-06 10:53:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-05-06 10:53:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:30,935 INFO L225 Difference]: With dead ends: 63 [2021-05-06 10:53:30,935 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 10:53:30,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 10:53:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 10:53:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-05-06 10:53:30,941 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2021-05-06 10:53:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:30,941 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-05-06 10:53:30,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 10:53:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-05-06 10:53:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 10:53:30,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:30,945 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:31,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 10:53:31,161 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:31,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1772710271, now seen corresponding path program 5 times [2021-05-06 10:53:31,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:31,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671515766] [2021-05-06 10:53:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:31,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:31,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607835968] [2021-05-06 10:53:31,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:31,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 10:53:31,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:31,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:53:31,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:31,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:53:31,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671515766] [2021-05-06 10:53:31,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607835968] [2021-05-06 10:53:31,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607835968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:31,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:31,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:31,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832915848] [2021-05-06 10:53:31,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:31,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:31,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:31,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:31,331 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 10:53:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:31,410 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-05-06 10:53:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:31,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-06 10:53:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:31,411 INFO L225 Difference]: With dead ends: 74 [2021-05-06 10:53:31,411 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 10:53:31,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 10:53:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 10:53:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:53:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-05-06 10:53:31,414 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 53 [2021-05-06 10:53:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:31,415 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-05-06 10:53:31,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 10:53:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-05-06 10:53:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 10:53:31,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:31,415 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:31,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:31,637 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:31,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:31,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2069437083, now seen corresponding path program 6 times [2021-05-06 10:53:31,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:31,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117015876] [2021-05-06 10:53:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:31,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:31,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135860586] [2021-05-06 10:53:31,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:31,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 10:53:31,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:53:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:31,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 10:53:31,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:31,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117015876] [2021-05-06 10:53:31,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:31,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135860586] [2021-05-06 10:53:31,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135860586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:31,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:31,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:53:31,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657360107] [2021-05-06 10:53:31,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:53:31,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:53:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:31,897 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 10:53:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:31,994 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-06 10:53:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:31,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-06 10:53:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:31,995 INFO L225 Difference]: With dead ends: 78 [2021-05-06 10:53:31,996 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 10:53:31,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 10:53:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 10:53:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:53:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-05-06 10:53:32,007 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 58 [2021-05-06 10:53:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:32,007 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-05-06 10:53:32,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 10:53:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-05-06 10:53:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 10:53:32,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:32,008 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:32,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:32,213 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1287458629, now seen corresponding path program 1 times [2021-05-06 10:53:32,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:32,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891989364] [2021-05-06 10:53:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:32,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:32,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618304495] [2021-05-06 10:53:32,219 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 10:53:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:53:32,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:32,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 10:53:32,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:32,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891989364] [2021-05-06 10:53:32,382 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:32,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618304495] [2021-05-06 10:53:32,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618304495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:32,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:32,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:32,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004884125] [2021-05-06 10:53:32,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:32,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:32,383 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:32,432 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-05-06 10:53:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:32,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 10:53:32,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:32,433 INFO L225 Difference]: With dead ends: 81 [2021-05-06 10:53:32,433 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 10:53:32,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 10:53:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 10:53:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:53:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-05-06 10:53:32,438 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2021-05-06 10:53:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:32,438 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-05-06 10:53:32,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-05-06 10:53:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 10:53:32,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:32,440 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:32,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 10:53:32,653 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:32,653 INFO L82 PathProgramCache]: Analyzing trace with hash 641015584, now seen corresponding path program 7 times [2021-05-06 10:53:32,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:32,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148192395] [2021-05-06 10:53:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:32,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:32,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936783724] [2021-05-06 10:53:32,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:32,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 10:53:32,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:32,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 10:53:32,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:32,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148192395] [2021-05-06 10:53:32,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:32,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936783724] [2021-05-06 10:53:32,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936783724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:32,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:32,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:32,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446504280] [2021-05-06 10:53:32,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:32,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:32,852 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:32,932 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-05-06 10:53:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 10:53:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:32,932 INFO L225 Difference]: With dead ends: 92 [2021-05-06 10:53:32,933 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 10:53:32,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 10:53:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 10:53:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 10:53:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-05-06 10:53:32,935 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 71 [2021-05-06 10:53:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:32,936 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-05-06 10:53:32,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-05-06 10:53:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 10:53:32,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:32,936 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:33,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 10:53:33,149 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:33,149 INFO L82 PathProgramCache]: Analyzing trace with hash -846020198, now seen corresponding path program 8 times [2021-05-06 10:53:33,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:33,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719348667] [2021-05-06 10:53:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:33,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:33,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569428843] [2021-05-06 10:53:33,154 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 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 10:53:33,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:33,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:33,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:53:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:33,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 10:53:33,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:33,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719348667] [2021-05-06 10:53:33,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:33,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569428843] [2021-05-06 10:53:33,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569428843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:33,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:33,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:33,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534509525] [2021-05-06 10:53:33,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:33,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:33,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:33,342 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 10:53:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:33,443 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-05-06 10:53:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-06 10:53:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:33,445 INFO L225 Difference]: With dead ends: 96 [2021-05-06 10:53:33,445 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 10:53:33,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 10:53:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 10:53:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:53:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-05-06 10:53:33,450 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 76 [2021-05-06 10:53:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:33,451 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-05-06 10:53:33,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 10:53:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-05-06 10:53:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:53:33,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:33,455 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:33,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:53:33,665 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash -338887002, now seen corresponding path program 2 times [2021-05-06 10:53:33,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:33,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158718297] [2021-05-06 10:53:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:33,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:33,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191604543] [2021-05-06 10:53:33,670 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 10:53:33,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:33,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 10:53:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:33,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 10:53:33,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:33,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158718297] [2021-05-06 10:53:33,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:33,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191604543] [2021-05-06 10:53:33,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191604543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:33,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:33,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146736191] [2021-05-06 10:53:33,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:33,843 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 10:53:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:33,908 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-05-06 10:53:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:53:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 89 [2021-05-06 10:53:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:33,909 INFO L225 Difference]: With dead ends: 99 [2021-05-06 10:53:33,909 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 10:53:33,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 10:53:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 10:53:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:53:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-05-06 10:53:33,912 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2021-05-06 10:53:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:33,912 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-05-06 10:53:33,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 10:53:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-05-06 10:53:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:53:33,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:33,913 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:34,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:34,121 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash -985330047, now seen corresponding path program 9 times [2021-05-06 10:53:34,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:34,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530135234] [2021-05-06 10:53:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:34,126 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:34,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616860759] [2021-05-06 10:53:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:34,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 10:53:34,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:34,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 10:53:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:34,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:34,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:34,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:34,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:34,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-05-06 10:53:34,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:34,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530135234] [2021-05-06 10:53:34,342 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:34,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616860759] [2021-05-06 10:53:34,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616860759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:34,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:34,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:34,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658394224] [2021-05-06 10:53:34,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:34,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:34,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:34,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:34,343 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 10:53:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:40,917 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-05-06 10:53:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-05-06 10:53:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:40,917 INFO L225 Difference]: With dead ends: 98 [2021-05-06 10:53:40,917 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:53:40,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:53:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:53:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:53:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 10:53:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:53:40,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2021-05-06 10:53:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:40,918 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:53:40,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 10:53:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:53:40,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:53:41,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 10:53:41,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:53:41 BasicIcfg [2021-05-06 10:53:41,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:53:41,122 INFO L168 Benchmark]: Toolchain (without parser) took 14789.41 ms. Allocated memory was 173.0 MB in the beginning and 219.2 MB in the end (delta: 46.1 MB). Free memory was 139.2 MB in the beginning and 177.4 MB in the end (delta: -38.1 MB). Peak memory consumption was 8.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:41,122 INFO L168 Benchmark]: CDTParser took 0.10 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 10:53:41,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.55 ms. Allocated memory is still 173.0 MB. Free memory was 139.0 MB in the beginning and 129.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:41,123 INFO L168 Benchmark]: Boogie Preprocessor took 48.86 ms. Allocated memory is still 173.0 MB. Free memory was 129.3 MB in the beginning and 157.5 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:41,123 INFO L168 Benchmark]: RCFGBuilder took 307.62 ms. Allocated memory is still 173.0 MB. Free memory was 157.3 MB in the beginning and 142.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:41,123 INFO L168 Benchmark]: IcfgTransformer took 24.50 ms. Allocated memory is still 173.0 MB. Free memory was 142.7 MB in the beginning and 141.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:41,123 INFO L168 Benchmark]: TraceAbstraction took 14229.36 ms. Allocated memory was 173.0 MB in the beginning and 219.2 MB in the end (delta: 46.1 MB). Free memory was 141.1 MB in the beginning and 177.4 MB in the end (delta: -36.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:41,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 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 167.55 ms. Allocated memory is still 173.0 MB. Free memory was 139.0 MB in the beginning and 129.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.86 ms. Allocated memory is still 173.0 MB. Free memory was 129.3 MB in the beginning and 157.5 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 307.62 ms. Allocated memory is still 173.0 MB. Free memory was 157.3 MB in the beginning and 142.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 24.50 ms. Allocated memory is still 173.0 MB. Free memory was 142.7 MB in the beginning and 141.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14229.36 ms. Allocated memory was 173.0 MB in the beginning and 219.2 MB in the end (delta: 46.1 MB). Free memory was 141.1 MB in the beginning and 177.4 MB in the end (delta: -36.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14189.5ms, OverallIterations: 18, TraceHistogramMax: 14, EmptinessCheckTime: 23.3ms, AutomataDifference: 7818.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 128 SDslu, 1717 SDs, 0 SdLazy, 1051 SolverSat, 114 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 7210.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 699 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 679.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=17, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 117.5ms AutomataMinimizationTime, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 129.5ms SsaConstructionTime, 449.4ms SatisfiabilityAnalysisTime, 1861.2ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 794 ConstructedInterpolants, 0 QuantifiedInterpolants, 2528 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2668 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 1501/2065 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...