/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:50:54,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:50:54,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:50:54,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:50:54,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:50:54,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:50:54,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:50:54,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:50:54,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:50:54,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:50:54,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:50:54,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:50:54,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:50:54,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:50:54,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:50:54,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:50:54,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:50:54,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:50:54,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:50:54,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:50:54,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:50:54,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:50:54,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:50:54,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:50:54,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:50:54,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:50:54,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:50:54,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:50:54,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:50:54,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:50:54,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:50:54,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:50:54,213 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:50:54,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:50:54,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:50:54,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:50:54,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:50:54,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:50:54,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:50:54,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:50:54,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:50:54,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:50:54,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:50:54,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:50:54,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:50:54,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:50:54,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:50:54,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:50:54,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:50:54,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:50:54,218 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:50:54,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:50:54,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:50:54,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:50:54,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:50:54,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:50:54,614 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:50:54,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2021-05-02 22:50:54,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5211c519/c66e7c9a317a47deb3cbbaec805270dd/FLAGda4be16fc [2021-05-02 22:50:55,134 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:50:55,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2021-05-02 22:50:55,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5211c519/c66e7c9a317a47deb3cbbaec805270dd/FLAGda4be16fc [2021-05-02 22:50:55,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5211c519/c66e7c9a317a47deb3cbbaec805270dd [2021-05-02 22:50:55,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:50:55,527 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:50:55,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:50:55,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:50:55,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:50:55,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2018d0d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55, skipping insertion in model container [2021-05-02 22:50:55,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:50:55,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:50:55,688 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_unwindbound20.c[520,533] [2021-05-02 22:50:55,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:50:55,715 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:50:55,731 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_unwindbound20.c[520,533] [2021-05-02 22:50:55,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:50:55,748 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:50:55,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55 WrapperNode [2021-05-02 22:50:55,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:50:55,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:50:55,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:50:55,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:50:55,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (1/1) ... [2021-05-02 22:50:55,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:50:55,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:50:55,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:50:55,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:50:55,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (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 [2021-05-02 22:50:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:50:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:50:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:50:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:50:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:50:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:50:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:50:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:50:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:50:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:50:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:50:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:50:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:50:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:50:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:50:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:50:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:50:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:50:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:50:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:50:56,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:50:56,176 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:50:56,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:50:56 BoogieIcfgContainer [2021-05-02 22:50:56,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:50:56,178 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:50:56,178 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:50:56,179 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:50:56,198 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:50:56" (1/1) ... [2021-05-02 22:50:56,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:50:56 BasicIcfg [2021-05-02 22:50:56,233 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:50:56,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:50:56,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:50:56,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:50:56,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:50:55" (1/4) ... [2021-05-02 22:50:56,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7a7653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:50:56, skipping insertion in model container [2021-05-02 22:50:56,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:55" (2/4) ... [2021-05-02 22:50:56,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7a7653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:50:56, skipping insertion in model container [2021-05-02 22:50:56,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:50:56" (3/4) ... [2021-05-02 22:50:56,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7a7653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:50:56, skipping insertion in model container [2021-05-02 22:50:56,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:50:56" (4/4) ... [2021-05-02 22:50:56,239 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound20.cJordan [2021-05-02 22:50:56,243 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:50:56,247 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:50:56,278 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:50:56,310 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:50:56,311 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:50:56,311 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:50:56,311 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:50:56,311 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:50:56,311 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:50:56,311 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:50:56,311 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:50:56,327 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) [2021-05-02 22:50:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:50:56,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:56,334 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:56,334 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:56,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-02 22:50:56,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:56,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065765167] [2021-05-02 22:50:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:56,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:50:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:50:56,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:56,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065765167] [2021-05-02 22:50:56,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065765167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:50:56,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:50:56,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:50:56,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420985006] [2021-05-02 22:50:56,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:50:56,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:56,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:50:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:50:56,614 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) [2021-05-02 22:50:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:56,687 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-02 22:50:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:50:56,689 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 [2021-05-02 22:50:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:56,695 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:50:56,695 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:50:56,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:50:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:50:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 22:50:56,722 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) [2021-05-02 22:50:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-02 22:50:56,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-02 22:50:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:56,724 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-02 22:50:56,725 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) [2021-05-02 22:50:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-02 22:50:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:50:56,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:56,725 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:56,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:50:56,726 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:56,727 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-02 22:50:56,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:56,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679125858] [2021-05-02 22:50:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:56,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:50:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:50:56,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679125858] [2021-05-02 22:50:56,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679125858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:50:56,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:50:56,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:50:56,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871871166] [2021-05-02 22:50:56,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:50:56,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:50:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:50:56,894 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) [2021-05-02 22:50:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:57,019 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-02 22:50:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:50:57,019 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 [2021-05-02 22:50:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:57,021 INFO L225 Difference]: With dead ends: 23 [2021-05-02 22:50:57,021 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 22:50:57,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 22:50:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 22:50:57,028 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) [2021-05-02 22:50:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-02 22:50:57,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-02 22:50:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:57,031 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-02 22:50:57,031 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) [2021-05-02 22:50:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-02 22:50:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:50:57,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:57,032 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:57,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:50:57,032 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-02 22:50:57,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:57,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321518559] [2021-05-02 22:50:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:57,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:50:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:50:57,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:57,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321518559] [2021-05-02 22:50:57,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321518559] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:50:57,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:50:57,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:50:57,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995279539] [2021-05-02 22:50:57,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:50:57,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:57,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:50:57,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:57,205 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) [2021-05-02 22:50:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:57,461 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-02 22:50:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:50:57,462 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 [2021-05-02 22:50:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:57,463 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:50:57,463 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:50:57,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:50:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:50:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 22:50:57,472 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) [2021-05-02 22:50:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 22:50:57,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 22:50:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:57,473 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 22:50:57,473 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) [2021-05-02 22:50:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 22:50:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:50:57,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:57,474 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:57,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 22:50:57,475 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2021-05-02 22:50:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:57,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763689747] [2021-05-02 22:50:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:57,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:57,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053762829] [2021-05-02 22:50:57,491 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 [2021-05-02 22:50:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:50:57,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:50:57,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:57,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763689747] [2021-05-02 22:50:57,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:57,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053762829] [2021-05-02 22:50:57,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053762829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:57,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:57,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:50:57,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206633766] [2021-05-02 22:50:57,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:50:57,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:50:57,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:50:57,660 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:50:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:57,760 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:50:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:50:57,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 22:50:57,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:57,763 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:50:57,763 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:50:57,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:50:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:50:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:50:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:50:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 22:50:57,775 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2021-05-02 22:50:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:57,776 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 22:50:57,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:50:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 22:50:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:50:57,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:57,777 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] [2021-05-02 22:50:58,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:58,001 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2021-05-02 22:50:58,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:58,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267728368] [2021-05-02 22:50:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:58,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:58,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471845759] [2021-05-02 22:50:58,013 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 [2021-05-02 22:50:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:58,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:50:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:58,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:58,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:58,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:58,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:58,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:58,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:58,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:58,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:50:58,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267728368] [2021-05-02 22:50:58,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:58,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471845759] [2021-05-02 22:50:58,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471845759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:58,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:58,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:50:58,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426369507] [2021-05-02 22:50:58,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:50:58,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:58,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:50:58,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:50:58,224 INFO L87 Difference]: Start difference. First operand 35 states and 42 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) [2021-05-02 22:50:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:58,271 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 22:50:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:50:58,272 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 [2021-05-02 22:50:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:58,273 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:50:58,273 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 22:50:58,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 22:50:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 22:50:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:50:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 22:50:58,280 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 30 [2021-05-02 22:50:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:58,280 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 22:50:58,280 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) [2021-05-02 22:50:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 22:50:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:50:58,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:58,281 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] [2021-05-02 22:50:58,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:58,489 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:58,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:58,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2021-05-02 22:50:58,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:58,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258742612] [2021-05-02 22:50:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:58,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:58,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075313438] [2021-05-02 22:50:58,497 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 [2021-05-02 22:50:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:58,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:50:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:50:58,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:58,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258742612] [2021-05-02 22:50:58,664 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:58,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075313438] [2021-05-02 22:50:58,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075313438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:58,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:58,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:50:58,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243858697] [2021-05-02 22:50:58,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:50:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:50:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:58,666 INFO L87 Difference]: Start difference. First operand 37 states and 44 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) [2021-05-02 22:50:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:58,736 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-02 22:50:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:50:58,736 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 [2021-05-02 22:50:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:58,738 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:50:58,738 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:50:58,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:50:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:50:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:50:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:50:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-05-02 22:50:58,751 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 30 [2021-05-02 22:50:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:58,751 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-05-02 22:50:58,751 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) [2021-05-02 22:50:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-05-02 22:50:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 22:50:58,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:58,753 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] [2021-05-02 22:50:58,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:58,957 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:58,957 INFO L82 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2021-05-02 22:50:58,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:58,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109594623] [2021-05-02 22:50:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:58,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:58,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344248505] [2021-05-02 22:50:58,966 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 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 [2021-05-02 22:50:59,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:50:59,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:50:59,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:50:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:59,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:50:59,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:59,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109594623] [2021-05-02 22:50:59,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:59,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344248505] [2021-05-02 22:50:59,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344248505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:59,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:59,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:50:59,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387645017] [2021-05-02 22:50:59,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:50:59,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:59,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:50:59,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:50:59,222 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:50:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:59,410 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-02 22:50:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:50:59,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 22:50:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:59,411 INFO L225 Difference]: With dead ends: 52 [2021-05-02 22:50:59,411 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:50:59,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:50:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:50:59,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:50:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:50:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 22:50:59,416 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-05-02 22:50:59,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:59,416 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 22:50:59,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:50:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 22:50:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:50:59,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:59,418 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] [2021-05-02 22:50:59,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:59,633 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:59,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2014164963, now seen corresponding path program 2 times [2021-05-02 22:50:59,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:59,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478553241] [2021-05-02 22:50:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:59,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:59,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220336187] [2021-05-02 22:50:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 22:50:59,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:50:59,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:50:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:50:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:59,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 22:50:59,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:59,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478553241] [2021-05-02 22:50:59,808 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:59,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220336187] [2021-05-02 22:50:59,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220336187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:59,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:59,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:50:59,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584205342] [2021-05-02 22:50:59,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:50:59,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:59,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:50:59,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:59,811 INFO L87 Difference]: Start difference. First operand 49 states and 57 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) [2021-05-02 22:50:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:59,865 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-02 22:50:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:50:59,865 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 [2021-05-02 22:50:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:59,867 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:50:59,868 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:50:59,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:50:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:50:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 22:50:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:50:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-05-02 22:50:59,879 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2021-05-02 22:50:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:59,879 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-05-02 22:50:59,879 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) [2021-05-02 22:50:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-05-02 22:50:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:50:59,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:59,886 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] [2021-05-02 22:51:00,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:00,109 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:00,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2015237439, now seen corresponding path program 3 times [2021-05-02 22:51:00,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:00,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167517903] [2021-05-02 22:51:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:00,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:00,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298295169] [2021-05-02 22:51:00,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 22:51:00,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:51:00,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:00,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:51:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:51:00,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:00,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167517903] [2021-05-02 22:51:00,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:00,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298295169] [2021-05-02 22:51:00,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298295169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:00,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:00,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:00,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526699653] [2021-05-02 22:51:00,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:00,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:00,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:00,328 INFO L87 Difference]: Start difference. First operand 51 states and 59 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:00,399 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 22:51:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:00,399 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-02 22:51:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:00,400 INFO L225 Difference]: With dead ends: 62 [2021-05-02 22:51:00,400 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 22:51:00,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 22:51:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-05-02 22:51:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:51:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-05-02 22:51:00,406 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 48 [2021-05-02 22:51:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:00,406 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-05-02 22:51:00,406 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-05-02 22:51:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 22:51:00,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:00,407 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] [2021-05-02 22:51:00,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:00,625 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1772710271, now seen corresponding path program 4 times [2021-05-02 22:51:00,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:00,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600460919] [2021-05-02 22:51:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:00,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:00,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130627537] [2021-05-02 22:51:00,633 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 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 [2021-05-02 22:51:00,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:51:00,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:51:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:00,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 22:51:00,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:00,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600460919] [2021-05-02 22:51:00,884 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:00,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130627537] [2021-05-02 22:51:00,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130627537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:00,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:00,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:00,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591787041] [2021-05-02 22:51:00,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:00,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:00,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:00,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:00,886 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:51:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:00,970 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-05-02 22:51:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:51:00,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-02 22:51:00,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:00,971 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:51:00,971 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:51:00,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:51:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:51:00,972 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) [2021-05-02 22:51:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:51:00,972 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2021-05-02 22:51:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:00,972 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:51:00,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:51:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:51:00,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:51:01,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:51:01,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:01 BasicIcfg [2021-05-02 22:51:01,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:51:01,185 INFO L168 Benchmark]: Toolchain (without parser) took 5657.44 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 149.5 MB in the beginning and 133.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 53.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:01,185 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:51:01,185 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.16 ms. Allocated memory is still 183.5 MB. Free memory was 149.3 MB in the beginning and 139.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:01,185 INFO L168 Benchmark]: Boogie Preprocessor took 53.81 ms. Allocated memory is still 183.5 MB. Free memory was 139.6 MB in the beginning and 167.5 MB in the end (delta: -27.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:01,185 INFO L168 Benchmark]: RCFGBuilder took 371.74 ms. Allocated memory is still 183.5 MB. Free memory was 167.5 MB in the beginning and 152.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:01,185 INFO L168 Benchmark]: IcfgTransformer took 54.39 ms. Allocated memory is still 183.5 MB. Free memory was 152.8 MB in the beginning and 151.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:01,185 INFO L168 Benchmark]: TraceAbstraction took 4950.24 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 151.1 MB in the beginning and 133.6 MB in the end (delta: 17.5 MB). Peak memory consumption was 55.8 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:01,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 217.16 ms. Allocated memory is still 183.5 MB. Free memory was 149.3 MB in the beginning and 139.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.81 ms. Allocated memory is still 183.5 MB. Free memory was 139.6 MB in the beginning and 167.5 MB in the end (delta: -27.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 371.74 ms. Allocated memory is still 183.5 MB. Free memory was 167.5 MB in the beginning and 152.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 54.39 ms. Allocated memory is still 183.5 MB. Free memory was 152.8 MB in the beginning and 151.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4950.24 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 151.1 MB in the beginning and 133.6 MB in the end (delta: 17.5 MB). Peak memory consumption was 55.8 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: 4874.4ms, OverallIterations: 10, TraceHistogramMax: 8, EmptinessCheckTime: 23.8ms, AutomataDifference: 1115.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 272 SDtfs, 88 SDslu, 752 SDs, 0 SdLazy, 560 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 566.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 610.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=9, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 82.7ms AutomataMinimizationTime, 10 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 90.6ms SsaConstructionTime, 234.0ms SatisfiabilityAnalysisTime, 1384.6ms InterpolantComputationTime, 296 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 1017 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1042 ConjunctsInSsa, 120 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 253/357 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...