/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/hard2_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:14:00,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:14:00,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:14:00,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:14:00,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:14:00,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:14:00,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:14:00,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:14:00,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:14:00,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:14:00,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:14:00,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:14:00,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:14:00,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:14:00,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:14:00,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:14:00,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:14:00,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:14:00,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:14:00,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:14:00,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:14:00,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:14:00,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:14:00,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:14:00,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:14:00,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:14:00,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:14:00,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:14:00,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:14:00,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:14:00,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:14:00,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:14:00,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:14:00,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:14:00,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:14:00,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:14:00,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:14:00,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:14:00,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:14:00,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:14:00,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:14:00,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:14:00,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:14:00,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:14:00,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:14:00,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:14:00,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:14:00,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:14:00,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:14:00,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:14:00,303 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:14:00,303 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:14:00,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:14:00,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:14:00,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:14:00,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:14:00,650 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:14:00,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound10.c [2021-05-06 09:14:00,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfafaa91c/1ec7857cc94342d4abd5d0beef045685/FLAG57031e75f [2021-05-06 09:14:01,138 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:14:01,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound10.c [2021-05-06 09:14:01,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfafaa91c/1ec7857cc94342d4abd5d0beef045685/FLAG57031e75f [2021-05-06 09:14:01,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfafaa91c/1ec7857cc94342d4abd5d0beef045685 [2021-05-06 09:14:01,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:14:01,547 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:14:01,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:14:01,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:14:01,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:14:01,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ddf962a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01, skipping insertion in model container [2021-05-06 09:14:01,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:14:01,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:14:01,676 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/hard2_valuebound10.c[526,539] [2021-05-06 09:14:01,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:14:01,695 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:14:01,705 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/hard2_valuebound10.c[526,539] [2021-05-06 09:14:01,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:14:01,725 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:14:01,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01 WrapperNode [2021-05-06 09:14:01,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:14:01,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:14:01,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:14:01,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:14:01,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (1/1) ... [2021-05-06 09:14:01,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:14:01,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:14:01,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:14:01,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:14:01,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:14:01,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:14:01,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:14:01,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:14:01,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:14:01,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:14:01,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:14:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:14:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:14:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:14:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:14:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:14:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:14:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:14:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:14:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:14:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:14:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:14:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:14:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:14:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:14:02,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:14:02,196 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:14:02,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:14:02 BoogieIcfgContainer [2021-05-06 09:14:02,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:14:02,198 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:14:02,198 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:14:02,199 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:14:02,201 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:14:02" (1/1) ... [2021-05-06 09:14:02,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:14:02 BasicIcfg [2021-05-06 09:14:02,214 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:14:02,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:14:02,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:14:02,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:14:02,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:14:01" (1/4) ... [2021-05-06 09:14:02,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbfb15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:14:02, skipping insertion in model container [2021-05-06 09:14:02,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:14:01" (2/4) ... [2021-05-06 09:14:02,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbfb15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:14:02, skipping insertion in model container [2021-05-06 09:14:02,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:14:02" (3/4) ... [2021-05-06 09:14:02,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbfb15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:14:02, skipping insertion in model container [2021-05-06 09:14:02,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:14:02" (4/4) ... [2021-05-06 09:14:02,221 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound10.cJordan [2021-05-06 09:14:02,225 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:14:02,228 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:14:02,243 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:14:02,262 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:14:02,262 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:14:02,262 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:14:02,262 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:14:02,262 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:14:02,262 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:14:02,262 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:14:02,262 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:14:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:14:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:14:02,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:02,287 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:02,287 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:02,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2021-05-06 09:14:02,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:02,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88331599] [2021-05-06 09:14:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:02,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:14:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:02,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:14:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:14:02,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:02,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88331599] [2021-05-06 09:14:02,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88331599] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:14:02,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:14:02,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:14:02,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203630459] [2021-05-06 09:14:02,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:14:02,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:02,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:14:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:14:02,631 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:14:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:02,776 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-06 09:14:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:14:02,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:14:02,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:02,785 INFO L225 Difference]: With dead ends: 35 [2021-05-06 09:14:02,785 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 09:14:02,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:14:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 09:14:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 09:14:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:14:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 09:14:02,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 09:14:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:02,813 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 09:14:02,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:14:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 09:14:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:14:02,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:02,814 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:02,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:14:02,815 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:02,815 INFO L82 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2021-05-06 09:14:02,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:02,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048029898] [2021-05-06 09:14:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:02,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:14:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:02,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:14:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:14:02,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:02,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048029898] [2021-05-06 09:14:02,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048029898] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:14:02,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:14:02,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:14:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674000270] [2021-05-06 09:14:02,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:14:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:14:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:14:02,948 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:14:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:03,258 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-06 09:14:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:14:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:14:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:03,262 INFO L225 Difference]: With dead ends: 41 [2021-05-06 09:14:03,263 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 09:14:03,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:14:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 09:14:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 09:14:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:14:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 09:14:03,282 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 09:14:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:03,282 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 09:14:03,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:14:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 09:14:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:14:03,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:03,285 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:03,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:14:03,287 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:03,289 INFO L82 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2021-05-06 09:14:03,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:03,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015856231] [2021-05-06 09:14:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:03,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:14:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:03,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:14:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:03,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 09:14:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:14:03,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:03,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015856231] [2021-05-06 09:14:03,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015856231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:14:03,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:14:03,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:14:03,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315850350] [2021-05-06 09:14:03,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:14:03,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:14:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:14:03,405 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:14:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:03,662 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 09:14:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:14:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:14:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:03,665 INFO L225 Difference]: With dead ends: 45 [2021-05-06 09:14:03,666 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 09:14:03,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:14:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 09:14:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 09:14:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:14:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 09:14:03,679 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 09:14:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:03,680 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 09:14:03,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:14:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 09:14:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:14:03,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:03,681 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:03,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:14:03,683 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2021-05-06 09:14:03,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:03,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085198416] [2021-05-06 09:14:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:03,709 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:03,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947243799] [2021-05-06 09:14:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:03,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:14:03,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:03,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:14:03,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:03,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085198416] [2021-05-06 09:14:03,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:03,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947243799] [2021-05-06 09:14:03,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947243799] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:14:03,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:14:03,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:14:03,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983621704] [2021-05-06 09:14:03,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:14:03,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:14:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:14:03,991 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:14:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:04,051 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-05-06 09:14:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:14:04,052 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), 2 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 27 [2021-05-06 09:14:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:04,053 INFO L225 Difference]: With dead ends: 53 [2021-05-06 09:14:04,053 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 09:14:04,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:14:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 09:14:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 09:14:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:14:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 09:14:04,063 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 09:14:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:04,063 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 09:14:04,063 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:14:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 09:14:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 09:14:04,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:04,065 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:04,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:04,291 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2021-05-06 09:14:04,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:04,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128044530] [2021-05-06 09:14:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:04,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:04,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477323029] [2021-05-06 09:14:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:04,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:14:04,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:04,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:14:04,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:04,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128044530] [2021-05-06 09:14:04,531 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:04,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477323029] [2021-05-06 09:14:04,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477323029] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:14:04,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:14:04,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:14:04,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522963258] [2021-05-06 09:14:04,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:14:04,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:14:04,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:14:04,534 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:14:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:04,589 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-06 09:14:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:14:04,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 09:14:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:04,591 INFO L225 Difference]: With dead ends: 63 [2021-05-06 09:14:04,591 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 09:14:04,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:14:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 09:14:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 09:14:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 09:14:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 09:14:04,606 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 09:14:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:04,606 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 09:14:04,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:14:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 09:14:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 09:14:04,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:04,609 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:04,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:04,827 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2021-05-06 09:14:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:04,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769580752] [2021-05-06 09:14:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:04,837 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:04,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176838206] [2021-05-06 09:14:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:14:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:05,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:14:05,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:05,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769580752] [2021-05-06 09:14:05,061 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:05,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176838206] [2021-05-06 09:14:05,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176838206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:05,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:05,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:14:05,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930921312] [2021-05-06 09:14:05,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:14:05,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:05,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:14:05,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:14:05,063 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 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) [2021-05-06 09:14:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:05,163 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 09:14:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:14:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 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 44 [2021-05-06 09:14:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:05,168 INFO L225 Difference]: With dead ends: 82 [2021-05-06 09:14:05,168 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 09:14:05,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:14:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 09:14:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 09:14:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:14:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 09:14:05,189 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 09:14:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:05,189 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 09:14:05,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 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) [2021-05-06 09:14:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 09:14:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 09:14:05,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:05,191 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:05,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:05,392 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1665528729, now seen corresponding path program 2 times [2021-05-06 09:14:05,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:05,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155525719] [2021-05-06 09:14:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:05,402 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:05,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693482607] [2021-05-06 09:14:05,402 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 [2021-05-06 09:14:05,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:14:05,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:14:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:05,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:14:05,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155525719] [2021-05-06 09:14:05,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693482607] [2021-05-06 09:14:05,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693482607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:05,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:05,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:14:05,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140219456] [2021-05-06 09:14:05,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:14:05,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:05,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:14:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:14:05,658 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:14:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:05,821 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-05-06 09:14:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:14:05,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 09:14:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:05,823 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:14:05,823 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 09:14:05,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:14:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 09:14:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 09:14:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 62 states have internal predecessors, (68), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:14:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 09:14:05,831 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 09:14:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:05,831 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 09:14:05,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:14:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 09:14:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 09:14:05,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:05,833 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:06,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:06,049 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:06,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:06,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2021-05-06 09:14:06,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:06,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383815474] [2021-05-06 09:14:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:06,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:06,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344318621] [2021-05-06 09:14:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:06,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:14:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:14:06,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:06,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383815474] [2021-05-06 09:14:06,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:06,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344318621] [2021-05-06 09:14:06,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344318621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:06,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:06,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:14:06,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120528131] [2021-05-06 09:14:06,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:14:06,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:14:06,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:14:06,321 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:14:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:06,434 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2021-05-06 09:14:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:14:06,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 09:14:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:06,441 INFO L225 Difference]: With dead ends: 125 [2021-05-06 09:14:06,441 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 09:14:06,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:14:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 09:14:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 09:14:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:14:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 09:14:06,449 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 09:14:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:06,450 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 09:14:06,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:14:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 09:14:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 09:14:06,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:06,451 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:06,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:06,659 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2021-05-06 09:14:06,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:06,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737741988] [2021-05-06 09:14:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:06,670 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:06,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504088625] [2021-05-06 09:14:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:14:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:06,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 09:14:06,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737741988] [2021-05-06 09:14:06,980 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504088625] [2021-05-06 09:14:06,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504088625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:06,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:06,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:14:06,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313668388] [2021-05-06 09:14:06,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:14:06,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:06,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:14:06,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:14:06,982 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:14:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:07,085 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2021-05-06 09:14:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:14:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 09:14:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:07,086 INFO L225 Difference]: With dead ends: 129 [2021-05-06 09:14:07,086 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 09:14:07,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:14:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 09:14:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 09:14:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 09:14:07,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 09:14:07,093 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 09:14:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:07,093 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 09:14:07,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:14:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 09:14:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 09:14:07,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:07,094 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:07,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:07,309 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:07,309 INFO L82 PathProgramCache]: Analyzing trace with hash -273867048, now seen corresponding path program 3 times [2021-05-06 09:14:07,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:07,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701554330] [2021-05-06 09:14:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:07,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:07,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999731958] [2021-05-06 09:14:07,318 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:07,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 09:14:07,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:07,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 09:14:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:07,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:07,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:07,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-05-06 09:14:07,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:07,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701554330] [2021-05-06 09:14:07,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:07,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999731958] [2021-05-06 09:14:07,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999731958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:07,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:07,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:14:07,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149386128] [2021-05-06 09:14:07,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:14:07,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:07,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:14:07,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:14:07,614 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 09:14:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:07,748 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 09:14:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:14:07,749 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 09:14:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:07,753 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:14:07,753 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 09:14:07,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:14:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 09:14:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 09:14:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:14:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 09:14:07,760 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 09:14:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:07,761 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 09:14:07,761 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 09:14:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 09:14:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 09:14:07,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:07,763 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:07,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 09:14:07,964 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1708305639, now seen corresponding path program 2 times [2021-05-06 09:14:07,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:07,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853665390] [2021-05-06 09:14:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:07,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:07,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999874797] [2021-05-06 09:14:07,972 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:08,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:14:08,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:08,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:14:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:08,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 09:14:08,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:08,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853665390] [2021-05-06 09:14:08,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:08,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999874797] [2021-05-06 09:14:08,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999874797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:08,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:08,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:14:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690638151] [2021-05-06 09:14:08,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:14:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:14:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:14:08,290 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:14:08,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:08,441 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2021-05-06 09:14:08,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:14:08,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-06 09:14:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:08,443 INFO L225 Difference]: With dead ends: 136 [2021-05-06 09:14:08,443 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 09:14:08,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:14:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 09:14:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 09:14:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:14:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 09:14:08,449 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 09:14:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:08,450 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 09:14:08,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:14:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 09:14:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:14:08,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:08,451 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:08,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 09:14:08,665 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 3 times [2021-05-06 09:14:08,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:08,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416133616] [2021-05-06 09:14:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:08,673 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:08,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323772310] [2021-05-06 09:14:08,673 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:08,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:14:08,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 09:14:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:09,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 09:14:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416133616] [2021-05-06 09:14:09,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323772310] [2021-05-06 09:14:09,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323772310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:09,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:09,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:14:09,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603947463] [2021-05-06 09:14:09,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:14:09,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:09,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:14:09,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:14:09,047 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:14:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:09,280 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2021-05-06 09:14:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:14:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:14:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:09,284 INFO L225 Difference]: With dead ends: 149 [2021-05-06 09:14:09,284 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 09:14:09,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:14:09,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 09:14:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-06 09:14:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 91 states have internal predecessors, (95), 34 states have call successors, (34), 20 states have call predecessors, (34), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:14:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-05-06 09:14:09,296 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 94 [2021-05-06 09:14:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:09,296 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-05-06 09:14:09,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:14:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-05-06 09:14:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:14:09,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:09,297 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:09,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:09,513 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1077967713, now seen corresponding path program 1 times [2021-05-06 09:14:09,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:09,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015084716] [2021-05-06 09:14:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:09,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:09,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155353744] [2021-05-06 09:14:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:14:09,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:14:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:09,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-06 09:14:09,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:09,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015084716] [2021-05-06 09:14:09,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:09,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155353744] [2021-05-06 09:14:09,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155353744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:14:09,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:14:09,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:14:09,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623654714] [2021-05-06 09:14:09,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:14:09,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:14:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:14:09,905 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:14:09,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:09,994 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2021-05-06 09:14:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:14:09,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:14:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:09,996 INFO L225 Difference]: With dead ends: 142 [2021-05-06 09:14:09,996 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 09:14:09,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:14:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 09:14:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-05-06 09:14:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 09:14:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-05-06 09:14:10,001 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 94 [2021-05-06 09:14:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:10,002 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-05-06 09:14:10,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:14:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-05-06 09:14:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 09:14:10,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:10,003 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:10,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:10,211 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:10,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1181205258, now seen corresponding path program 4 times [2021-05-06 09:14:10,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:10,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15359090] [2021-05-06 09:14:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:10,220 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:10,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079780541] [2021-05-06 09:14:10,220 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:10,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:14:10,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 09:14:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:10,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 09:14:10,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15359090] [2021-05-06 09:14:10,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079780541] [2021-05-06 09:14:10,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079780541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:10,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:10,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:14:10,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004251744] [2021-05-06 09:14:10,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:14:10,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:14:10,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:14:10,514 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 09:14:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:10,707 INFO L93 Difference]: Finished difference Result 166 states and 182 transitions. [2021-05-06 09:14:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:14:10,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 98 [2021-05-06 09:14:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:10,709 INFO L225 Difference]: With dead ends: 166 [2021-05-06 09:14:10,709 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 09:14:10,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:14:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 09:14:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-05-06 09:14:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 106 states have internal predecessors, (112), 35 states have call successors, (35), 25 states have call predecessors, (35), 24 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:14:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-05-06 09:14:10,715 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 98 [2021-05-06 09:14:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:10,716 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-05-06 09:14:10,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 09:14:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-05-06 09:14:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 09:14:10,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:10,717 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:10,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 09:14:10,937 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:10,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:10,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1771017874, now seen corresponding path program 2 times [2021-05-06 09:14:10,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:10,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412343320] [2021-05-06 09:14:10,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:10,945 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:10,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620855269] [2021-05-06 09:14:10,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:11,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:14:11,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 09:14:11,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:11,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 09:14:11,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:11,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412343320] [2021-05-06 09:14:11,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:11,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620855269] [2021-05-06 09:14:11,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620855269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:11,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:11,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:14:11,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604420038] [2021-05-06 09:14:11,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:14:11,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:14:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:14:11,320 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:14:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:11,478 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2021-05-06 09:14:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:14:11,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 09:14:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:11,479 INFO L225 Difference]: With dead ends: 168 [2021-05-06 09:14:11,480 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 09:14:11,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:14:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 09:14:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 09:14:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 82 states have internal predecessors, (88), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 09:14:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2021-05-06 09:14:11,484 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 105 [2021-05-06 09:14:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:11,484 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2021-05-06 09:14:11,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:14:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2021-05-06 09:14:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 09:14:11,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:11,486 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:11,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 09:14:11,705 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash 348272066, now seen corresponding path program 3 times [2021-05-06 09:14:11,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:11,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236860321] [2021-05-06 09:14:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:11,712 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:11,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862606972] [2021-05-06 09:14:11,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:11,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:14:11,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:11,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:14:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:11,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:11,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:11,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:11,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-05-06 09:14:11,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236860321] [2021-05-06 09:14:11,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862606972] [2021-05-06 09:14:11,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862606972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:11,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:11,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 09:14:11,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956807636] [2021-05-06 09:14:11,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:14:11,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:14:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:14:11,951 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 09:14:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:11,973 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2021-05-06 09:14:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:14:11,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 109 [2021-05-06 09:14:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:11,974 INFO L225 Difference]: With dead ends: 137 [2021-05-06 09:14:11,974 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 09:14:11,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:14:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 09:14:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 09:14:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 86 states have internal predecessors, (92), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:14:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-05-06 09:14:11,982 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 109 [2021-05-06 09:14:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:11,984 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-05-06 09:14:11,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 09:14:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-05-06 09:14:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 09:14:12,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:12,006 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:12,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 09:14:12,217 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1079108237, now seen corresponding path program 5 times [2021-05-06 09:14:12,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:12,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982519952] [2021-05-06 09:14:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:12,229 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:12,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337202308] [2021-05-06 09:14:12,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:12,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 09:14:12,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:12,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 09:14:12,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:12,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 09:14:12,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:12,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982519952] [2021-05-06 09:14:12,754 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:12,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337202308] [2021-05-06 09:14:12,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337202308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:12,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:12,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 09:14:12,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528584608] [2021-05-06 09:14:12,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 09:14:12,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:12,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 09:14:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 09:14:12,756 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 09:14:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:13,066 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2021-05-06 09:14:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 09:14:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 111 [2021-05-06 09:14:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:13,070 INFO L225 Difference]: With dead ends: 161 [2021-05-06 09:14:13,070 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 09:14:13,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:14:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 09:14:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-05-06 09:14:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 95 states have internal predecessors, (102), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:14:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2021-05-06 09:14:13,076 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 111 [2021-05-06 09:14:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:13,076 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2021-05-06 09:14:13,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 09:14:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2021-05-06 09:14:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 09:14:13,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:13,077 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:13,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:13,293 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:13,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1546710215, now seen corresponding path program 6 times [2021-05-06 09:14:13,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:13,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440113798] [2021-05-06 09:14:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:13,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:13,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54835726] [2021-05-06 09:14:13,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:13,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 09:14:13,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:13,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 09:14:13,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:13,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 133 proven. 16 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-05-06 09:14:13,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:14:13,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440113798] [2021-05-06 09:14:13,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:14:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54835726] [2021-05-06 09:14:13,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54835726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:14:13,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:14:13,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:14:13,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111189644] [2021-05-06 09:14:13,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:14:13,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:14:13,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:14:13,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:14:13,650 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 09:14:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:14:13,806 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2021-05-06 09:14:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:14:13,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-05-06 09:14:13,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:14:13,807 INFO L225 Difference]: With dead ends: 174 [2021-05-06 09:14:13,808 INFO L226 Difference]: Without dead ends: 174 [2021-05-06 09:14:13,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:14:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-06 09:14:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 163. [2021-05-06 09:14:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 104 states have internal predecessors, (113), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 09:14:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2021-05-06 09:14:13,813 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 115 [2021-05-06 09:14:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:14:13,813 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2021-05-06 09:14:13,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 09:14:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2021-05-06 09:14:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 09:14:13,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:14:13,814 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:14:14,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 09:14:14,038 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:14:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:14:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash 394679903, now seen corresponding path program 4 times [2021-05-06 09:14:14,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:14:14,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797783915] [2021-05-06 09:14:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:14:14,046 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:14:14,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817233714] [2021-05-06 09:14:14,046 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:14:14,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:14:14,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:14:14,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:14:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:14:14,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:14,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:15,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:16,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:17,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:14:17,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:16:06,517 WARN L205 SmtUtils]: Spent 1.81 m on a formula simplification. DAG size of input: 25308 DAG size of output: 24817 [2021-05-06 09:16:10,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:16:12,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:16:14,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:18:04,175 WARN L205 SmtUtils]: Spent 1.82 m on a formula simplification. DAG size of input: 25362 DAG size of output: 24864