/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/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:33:41,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:33:41,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:33:41,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:33:41,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:33:41,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:33:41,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:33:41,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:33:41,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:33:41,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:33:41,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:33:41,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:33:41,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:33:41,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:33:41,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:33:41,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:33:41,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:33:41,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:33:41,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:33:41,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:33:41,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:33:41,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:33:41,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:33:41,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:33:41,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:33:41,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:33:41,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:33:41,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:33:41,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:33:41,211 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:33:41,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:33:41,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:33:41,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:33:41,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:33:41,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:33:41,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:33:41,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:33:41,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:33:41,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:33:41,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:33:41,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:33:41,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:33:41,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:33:41,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:33:41,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:33:41,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:33:41,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:33:41,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:41,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:33:41,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:33:41,215 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:33:41,215 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:33:41,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:33:41,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:33:41,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:33:41,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:33:41,477 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:33:41,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-05-02 20:33:41,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0634eaff/f2937bf444e44f7a8b8db9c7f3902379/FLAG429051dd8 [2021-05-02 20:33:41,913 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:33:41,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-05-02 20:33:41,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0634eaff/f2937bf444e44f7a8b8db9c7f3902379/FLAG429051dd8 [2021-05-02 20:33:41,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0634eaff/f2937bf444e44f7a8b8db9c7f3902379 [2021-05-02 20:33:41,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:33:41,936 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:33:41,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:41,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:33:41,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:33:41,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:41" (1/1) ... [2021-05-02 20:33:41,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2bbb27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:41, skipping insertion in model container [2021-05-02 20:33:41,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:41" (1/1) ... [2021-05-02 20:33:41,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:33:41,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:33:42,070 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/egcd3-ll_valuebound10.c[490,503] [2021-05-02 20:33:42,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:42,105 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:33:42,114 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/egcd3-ll_valuebound10.c[490,503] [2021-05-02 20:33:42,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:42,181 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:33:42,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42 WrapperNode [2021-05-02 20:33:42,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:42,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:33:42,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:33:42,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:33:42,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (1/1) ... [2021-05-02 20:33:42,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (1/1) ... [2021-05-02 20:33:42,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (1/1) ... [2021-05-02 20:33:42,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (1/1) ... [2021-05-02 20:33:42,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (1/1) ... [2021-05-02 20:33:42,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (1/1) ... [2021-05-02 20:33:42,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (1/1) ... [2021-05-02 20:33:42,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:33:42,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:33:42,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:33:42,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:33:42,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:42,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:33:42,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:33:42,298 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:33:42,298 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:33:42,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:33:42,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:33:42,299 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:33:42,299 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:33:42,299 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:33:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:33:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:33:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:33:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:33:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:33:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:33:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:33:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:33:42,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:33:42,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:33:42,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:33:42,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:33:42,504 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:33:42,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:42 BoogieIcfgContainer [2021-05-02 20:33:42,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:33:42,506 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:33:42,506 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:33:42,506 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:33:42,514 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:42" (1/1) ... [2021-05-02 20:33:42,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:42 BasicIcfg [2021-05-02 20:33:42,533 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:33:42,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:33:42,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:33:42,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:33:42,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:33:41" (1/4) ... [2021-05-02 20:33:42,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afc1dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:42, skipping insertion in model container [2021-05-02 20:33:42,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:42" (2/4) ... [2021-05-02 20:33:42,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afc1dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:42, skipping insertion in model container [2021-05-02 20:33:42,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:42" (3/4) ... [2021-05-02 20:33:42,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afc1dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:42, skipping insertion in model container [2021-05-02 20:33:42,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:42" (4/4) ... [2021-05-02 20:33:42,539 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.cJordan [2021-05-02 20:33:42,542 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:33:42,546 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:33:42,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:33:42,569 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:33:42,570 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:33:42,570 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:33:42,570 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:33:42,570 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:33:42,570 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:33:42,570 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:33:42,570 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:33:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:33:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:33:42,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:42,588 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:42,588 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:42,594 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-02 20:33:42,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:42,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993310650] [2021-05-02 20:33:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:42,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:33:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:42,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:33:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:42,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:33:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:42,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:33:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:42,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:33:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:33:42,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:42,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993310650] [2021-05-02 20:33:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993310650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:42,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:42,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:33:42,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026558835] [2021-05-02 20:33:42,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:33:42,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:33:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:42,869 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:42,999 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 20:33:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:33:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:33:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:43,006 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:33:43,006 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:33:43,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:33:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:33:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 20:33:43,036 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 20:33:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:43,037 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 20:33:43,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 20:33:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:33:43,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:43,039 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:43,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:33:43,040 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:43,042 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-02 20:33:43,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:43,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466628143] [2021-05-02 20:33:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:43,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:43,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870266778] [2021-05-02 20:33:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:43,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:43,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:33:43,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:43,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466628143] [2021-05-02 20:33:43,244 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:43,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870266778] [2021-05-02 20:33:43,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870266778] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:43,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:43,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:43,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668407239] [2021-05-02 20:33:43,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:43,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:43,246 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:43,309 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 20:33:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:43,310 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 20:33:43,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:43,311 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:33:43,311 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:33:43,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:33:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 20:33:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:33:43,321 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 20:33:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:43,321 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:33:43,321 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:33:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:33:43,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:43,322 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:43,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:33:43,537 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-02 20:33:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:43,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895283928] [2021-05-02 20:33:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:43,550 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:43,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155270269] [2021-05-02 20:33:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:43,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:33:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:43,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:33:43,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:43,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895283928] [2021-05-02 20:33:43,863 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:43,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155270269] [2021-05-02 20:33:43,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155270269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:43,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:43,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:43,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413363819] [2021-05-02 20:33:43,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:43,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:43,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:43,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:43,866 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:43,980 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-02 20:33:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 20:33:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:43,984 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:33:43,984 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 20:33:43,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 20:33:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 20:33:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:33:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 20:33:43,992 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 20:33:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:43,993 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 20:33:43,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 20:33:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:33:43,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:43,993 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:44,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:44,197 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:44,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:44,197 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-02 20:33:44,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:44,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927746684] [2021-05-02 20:33:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:44,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:44,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24518129] [2021-05-02 20:33:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:44,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:33:44,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:44,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927746684] [2021-05-02 20:33:44,349 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:44,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24518129] [2021-05-02 20:33:44,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24518129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:44,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:44,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:44,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556598836] [2021-05-02 20:33:44,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:44,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:44,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:44,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:44,350 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:44,511 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-02 20:33:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:44,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:33:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:44,515 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:33:44,515 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:33:44,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:33:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 20:33:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:33:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 20:33:44,525 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 20:33:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:44,525 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 20:33:44,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 20:33:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:33:44,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:44,526 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:44,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:44,741 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-02 20:33:44,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:44,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310814765] [2021-05-02 20:33:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:44,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:44,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262992429] [2021-05-02 20:33:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:33:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:44,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:33:44,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:44,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310814765] [2021-05-02 20:33:44,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:44,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262992429] [2021-05-02 20:33:44,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262992429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:44,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:44,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:44,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810159008] [2021-05-02 20:33:44,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:44,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:44,958 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:33:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:45,056 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-05-02 20:33:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 20:33:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:45,060 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:33:45,060 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 20:33:45,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 20:33:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 20:33:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:33:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 20:33:45,075 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 20:33:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:45,075 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 20:33:45,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:33:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 20:33:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:33:45,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:45,076 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:45,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:45,277 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:45,277 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-02 20:33:45,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:45,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571120036] [2021-05-02 20:33:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:45,286 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:45,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898826784] [2021-05-02 20:33:45,287 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 [2021-05-02 20:33:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:33:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:45,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:33:45,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:45,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571120036] [2021-05-02 20:33:45,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:45,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898826784] [2021-05-02 20:33:45,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898826784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:45,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:45,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:45,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960036690] [2021-05-02 20:33:45,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:45,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:45,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:45,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:45,513 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:45,633 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2021-05-02 20:33:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:45,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 20:33:45,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:45,635 INFO L225 Difference]: With dead ends: 109 [2021-05-02 20:33:45,635 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 20:33:45,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 20:33:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 20:33:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:33:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 20:33:45,641 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 20:33:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:45,641 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 20:33:45,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 20:33:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:33:45,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:45,642 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:45,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:33:45,853 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-02 20:33:45,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:45,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178219827] [2021-05-02 20:33:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:45,867 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:45,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523432115] [2021-05-02 20:33:45,868 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 [2021-05-02 20:33:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:45,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:45,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:33:46,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:46,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178219827] [2021-05-02 20:33:46,040 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:46,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523432115] [2021-05-02 20:33:46,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523432115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:46,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:46,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:46,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730714653] [2021-05-02 20:33:46,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:46,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:46,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:46,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:46,041 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:46,158 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-05-02 20:33:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:46,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 20:33:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:46,161 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:33:46,161 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:33:46,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:33:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 20:33:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:33:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 20:33:46,176 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 20:33:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:46,176 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 20:33:46,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 20:33:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:33:46,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:46,180 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:46,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:46,385 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-02 20:33:46,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:46,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966683369] [2021-05-02 20:33:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:46,393 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:46,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149497738] [2021-05-02 20:33:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:46,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:33:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:46,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:33:46,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:46,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966683369] [2021-05-02 20:33:46,623 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:46,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149497738] [2021-05-02 20:33:46,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149497738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:46,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:46,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:46,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943000912] [2021-05-02 20:33:46,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:46,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:46,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:46,625 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:33:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:46,804 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2021-05-02 20:33:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 20:33:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:46,805 INFO L225 Difference]: With dead ends: 122 [2021-05-02 20:33:46,805 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 20:33:46,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 20:33:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 20:33:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:33:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 20:33:46,810 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 20:33:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:46,810 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 20:33:46,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:33:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 20:33:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:33:46,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:46,811 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:47,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:47,025 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-02 20:33:47,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:47,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654623843] [2021-05-02 20:33:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:47,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:47,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235092430] [2021-05-02 20:33:47,033 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 [2021-05-02 20:33:47,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:47,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:33:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:47,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:33:47,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:47,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654623843] [2021-05-02 20:33:47,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:47,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235092430] [2021-05-02 20:33:47,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235092430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:47,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313464551] [2021-05-02 20:33:47,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:47,151 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:47,206 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2021-05-02 20:33:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 20:33:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:47,211 INFO L225 Difference]: With dead ends: 130 [2021-05-02 20:33:47,211 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 20:33:47,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 20:33:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 20:33:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:33:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 20:33:47,217 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 20:33:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:47,218 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 20:33:47,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 20:33:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:33:47,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:47,219 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:47,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:33:47,433 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-02 20:33:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:47,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415682916] [2021-05-02 20:33:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:47,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:47,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823320304] [2021-05-02 20:33:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:47,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:47,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:47,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 20:33:47,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:47,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415682916] [2021-05-02 20:33:47,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:47,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823320304] [2021-05-02 20:33:47,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823320304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:47,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:47,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:33:47,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101032389] [2021-05-02 20:33:47,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:33:47,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:33:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:47,588 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:33:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:47,654 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2021-05-02 20:33:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:33:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 20:33:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:47,656 INFO L225 Difference]: With dead ends: 152 [2021-05-02 20:33:47,656 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:33:47,656 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:33:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 20:33:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:33:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 20:33:47,665 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 20:33:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:47,666 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 20:33:47,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:33:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 20:33:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:33:47,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:47,667 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:47,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:47,885 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:47,885 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-02 20:33:47,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:47,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771956163] [2021-05-02 20:33:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:47,892 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:47,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021847194] [2021-05-02 20:33:47,892 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 [2021-05-02 20:33:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:47,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:47,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:33:48,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:48,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771956163] [2021-05-02 20:33:48,093 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:48,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021847194] [2021-05-02 20:33:48,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021847194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:48,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:48,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:48,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315067812] [2021-05-02 20:33:48,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:48,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:48,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:48,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:48,094 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:33:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:48,306 INFO L93 Difference]: Finished difference Result 183 states and 259 transitions. [2021-05-02 20:33:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:33:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 20:33:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:48,309 INFO L225 Difference]: With dead ends: 183 [2021-05-02 20:33:48,309 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 20:33:48,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:33:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 20:33:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 20:33:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 20:33:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 20:33:48,316 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 20:33:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:48,316 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 20:33:48,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:33:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 20:33:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:33:48,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:48,317 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:48,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:48,533 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-02 20:33:48,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:48,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325673024] [2021-05-02 20:33:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:48,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:48,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135054402] [2021-05-02 20:33:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 20:33:48,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:48,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:33:48,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:48,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325673024] [2021-05-02 20:33:48,921 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:48,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135054402] [2021-05-02 20:33:48,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135054402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:48,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:48,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:33:48,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38914393] [2021-05-02 20:33:48,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:33:48,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:48,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:33:48,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:48,922 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:33:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:49,383 INFO L93 Difference]: Finished difference Result 186 states and 251 transitions. [2021-05-02 20:33:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-02 20:33:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:49,386 INFO L225 Difference]: With dead ends: 186 [2021-05-02 20:33:49,386 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 20:33:49,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:33:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 20:33:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 20:33:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 20:33:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 20:33:49,392 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 20:33:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:49,393 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 20:33:49,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:33:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 20:33:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:33:49,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:49,393 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:49,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:33:49,609 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-02 20:33:49,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:49,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137676966] [2021-05-02 20:33:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:49,618 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:49,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713617936] [2021-05-02 20:33:49,618 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 [2021-05-02 20:33:49,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:49,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:33:49,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:49,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:33:49,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:49,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137676966] [2021-05-02 20:33:49,782 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:49,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713617936] [2021-05-02 20:33:49,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713617936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:49,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:49,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:49,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450554196] [2021-05-02 20:33:49,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:49,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:49,783 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:33:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:49,996 INFO L93 Difference]: Finished difference Result 320 states and 476 transitions. [2021-05-02 20:33:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:33:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 20:33:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:49,999 INFO L225 Difference]: With dead ends: 320 [2021-05-02 20:33:49,999 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 20:33:49,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:33:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 20:33:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 20:33:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:33:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 20:33:50,016 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 20:33:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:50,016 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 20:33:50,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:33:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 20:33:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:33:50,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:50,017 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:50,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:33:50,232 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:50,232 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-02 20:33:50,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:50,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859624651] [2021-05-02 20:33:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:50,239 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:50,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134793572] [2021-05-02 20:33:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 20:33:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:33:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:50,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:33:50,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:50,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859624651] [2021-05-02 20:33:50,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:50,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134793572] [2021-05-02 20:33:50,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134793572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:50,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:50,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:50,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293717458] [2021-05-02 20:33:50,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:50,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:50,443 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 20:33:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:50,617 INFO L93 Difference]: Finished difference Result 246 states and 341 transitions. [2021-05-02 20:33:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-02 20:33:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:50,619 INFO L225 Difference]: With dead ends: 246 [2021-05-02 20:33:50,619 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 20:33:50,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:33:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 20:33:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-05-02 20:33:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 144 states have internal predecessors, (163), 83 states have call successors, (83), 16 states have call predecessors, (83), 15 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-02 20:33:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 327 transitions. [2021-05-02 20:33:50,627 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 327 transitions. Word has length 74 [2021-05-02 20:33:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:50,627 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 327 transitions. [2021-05-02 20:33:50,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 20:33:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 327 transitions. [2021-05-02 20:33:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:33:50,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:50,628 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:50,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:33:50,841 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:50,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-02 20:33:50,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:50,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137550384] [2021-05-02 20:33:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:50,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:50,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642656581] [2021-05-02 20:33:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 20:33:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:33:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:50,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:33:51,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:51,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137550384] [2021-05-02 20:33:51,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:51,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642656581] [2021-05-02 20:33:51,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642656581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:51,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:51,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:33:51,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399837517] [2021-05-02 20:33:51,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:33:51,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:33:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:51,298 INFO L87 Difference]: Start difference. First operand 236 states and 327 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:33:52,359 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 20:33:52,543 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 20:33:52,764 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 20:33:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:53,824 INFO L93 Difference]: Finished difference Result 369 states and 532 transitions. [2021-05-02 20:33:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 20:33:53,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 20:33:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:53,826 INFO L225 Difference]: With dead ends: 369 [2021-05-02 20:33:53,826 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 20:33:53,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1574.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 20:33:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 20:33:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 345. [2021-05-02 20:33:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 196 states have (on average 1.2142857142857142) internal successors, (238), 208 states have internal predecessors, (238), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 118 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 20:33:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 498 transitions. [2021-05-02 20:33:53,836 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 498 transitions. Word has length 72 [2021-05-02 20:33:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:53,836 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 498 transitions. [2021-05-02 20:33:53,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:33:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 498 transitions. [2021-05-02 20:33:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:33:53,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:53,837 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:54,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:54,050 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-02 20:33:54,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:54,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274217853] [2021-05-02 20:33:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:54,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:54,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048200610] [2021-05-02 20:33:54,056 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 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 [2021-05-02 20:33:54,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:54,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:54,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:33:54,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:54,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:33:54,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:54,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274217853] [2021-05-02 20:33:54,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:54,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048200610] [2021-05-02 20:33:54,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048200610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:54,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:54,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:54,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276778458] [2021-05-02 20:33:54,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:54,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:54,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:54,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:54,219 INFO L87 Difference]: Start difference. First operand 345 states and 498 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:33:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:54,254 INFO L93 Difference]: Finished difference Result 326 states and 449 transitions. [2021-05-02 20:33:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:54,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 20:33:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:54,256 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:33:54,256 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 20:33:54,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 20:33:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 299. [2021-05-02 20:33:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 175 states have (on average 1.2) internal successors, (210), 178 states have internal predecessors, (210), 107 states have call successors, (107), 17 states have call predecessors, (107), 16 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 20:33:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 422 transitions. [2021-05-02 20:33:54,266 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 422 transitions. Word has length 77 [2021-05-02 20:33:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:54,267 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 422 transitions. [2021-05-02 20:33:54,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:33:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 422 transitions. [2021-05-02 20:33:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:33:54,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:54,268 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:54,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:33:54,481 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-02 20:33:54,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:54,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727420627] [2021-05-02 20:33:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:54,487 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:54,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341722898] [2021-05-02 20:33:54,487 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 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 [2021-05-02 20:33:54,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:33:54,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:54,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:33:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:54,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 20:33:54,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:54,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727420627] [2021-05-02 20:33:54,647 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:54,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341722898] [2021-05-02 20:33:54,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341722898] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:54,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:54,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 20:33:54,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753111967] [2021-05-02 20:33:54,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:33:54,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:33:54,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:54,650 INFO L87 Difference]: Start difference. First operand 299 states and 422 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:33:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:54,712 INFO L93 Difference]: Finished difference Result 340 states and 487 transitions. [2021-05-02 20:33:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:33:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 20:33:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:54,713 INFO L225 Difference]: With dead ends: 340 [2021-05-02 20:33:54,713 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 20:33:54,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 20:33:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2021-05-02 20:33:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 191 states have internal predecessors, (228), 127 states have call successors, (127), 18 states have call predecessors, (127), 17 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-02 20:33:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 480 transitions. [2021-05-02 20:33:54,722 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 480 transitions. Word has length 77 [2021-05-02 20:33:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:54,722 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 480 transitions. [2021-05-02 20:33:54,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:33:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 480 transitions. [2021-05-02 20:33:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:33:54,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:54,723 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:54,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:33:54,939 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:54,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:54,939 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-02 20:33:54,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:54,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560235748] [2021-05-02 20:33:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:54,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:54,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077452414] [2021-05-02 20:33:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:33:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:55,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:33:55,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:55,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560235748] [2021-05-02 20:33:55,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:55,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077452414] [2021-05-02 20:33:55,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077452414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:55,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:55,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:55,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542150657] [2021-05-02 20:33:55,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:55,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:55,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:55,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:55,192 INFO L87 Difference]: Start difference. First operand 333 states and 480 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:33:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:55,522 INFO L93 Difference]: Finished difference Result 440 states and 639 transitions. [2021-05-02 20:33:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:55,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-02 20:33:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:55,524 INFO L225 Difference]: With dead ends: 440 [2021-05-02 20:33:55,524 INFO L226 Difference]: Without dead ends: 440 [2021-05-02 20:33:55,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:33:55,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-02 20:33:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 351. [2021-05-02 20:33:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 196 states have (on average 1.2040816326530612) internal successors, (236), 201 states have internal predecessors, (236), 135 states have call successors, (135), 20 states have call predecessors, (135), 19 states have return successors, (133), 129 states have call predecessors, (133), 133 states have call successors, (133) [2021-05-02 20:33:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 504 transitions. [2021-05-02 20:33:55,538 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 504 transitions. Word has length 79 [2021-05-02 20:33:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:55,538 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 504 transitions. [2021-05-02 20:33:55,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:33:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 504 transitions. [2021-05-02 20:33:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:33:55,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:55,539 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:55,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:33:55,753 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-02 20:33:55,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:55,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998519496] [2021-05-02 20:33:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:55,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:55,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178297049] [2021-05-02 20:33:55,770 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:55,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:33:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 20:33:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:55,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 20:33:56,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:56,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998519496] [2021-05-02 20:33:56,510 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:56,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178297049] [2021-05-02 20:33:56,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178297049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:56,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:56,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:33:56,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892617651] [2021-05-02 20:33:56,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:33:56,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:56,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:33:56,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:56,512 INFO L87 Difference]: Start difference. First operand 351 states and 504 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:33:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:57,375 INFO L93 Difference]: Finished difference Result 405 states and 579 transitions. [2021-05-02 20:33:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 77 [2021-05-02 20:33:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:57,385 INFO L225 Difference]: With dead ends: 405 [2021-05-02 20:33:57,385 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:33:57,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:33:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:33:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:33:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:33:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:33:57,386 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2021-05-02 20:33:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:57,386 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:33:57,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:33:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:33:57,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:33:57,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:57,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:57 BasicIcfg [2021-05-02 20:33:57,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:33:57,596 INFO L168 Benchmark]: Toolchain (without parser) took 15659.89 ms. Allocated memory was 191.9 MB in the beginning and 276.8 MB in the end (delta: 84.9 MB). Free memory was 157.1 MB in the beginning and 143.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 100.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:57,596 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 191.9 MB. Free memory is still 173.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:33:57,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.26 ms. Allocated memory is still 191.9 MB. Free memory was 156.9 MB in the beginning and 175.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:57,596 INFO L168 Benchmark]: Boogie Preprocessor took 44.02 ms. Allocated memory is still 191.9 MB. Free memory was 175.2 MB in the beginning and 173.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:57,596 INFO L168 Benchmark]: RCFGBuilder took 278.10 ms. Allocated memory is still 191.9 MB. Free memory was 173.6 MB in the beginning and 156.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:57,596 INFO L168 Benchmark]: IcfgTransformer took 27.84 ms. Allocated memory is still 191.9 MB. Free memory was 155.8 MB in the beginning and 154.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:57,597 INFO L168 Benchmark]: TraceAbstraction took 15061.36 ms. Allocated memory was 191.9 MB in the beginning and 276.8 MB in the end (delta: 84.9 MB). Free memory was 154.2 MB in the beginning and 143.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 97.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:57,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 191.9 MB. Free memory is still 173.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.26 ms. Allocated memory is still 191.9 MB. Free memory was 156.9 MB in the beginning and 175.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.02 ms. Allocated memory is still 191.9 MB. Free memory was 175.2 MB in the beginning and 173.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.10 ms. Allocated memory is still 191.9 MB. Free memory was 173.6 MB in the beginning and 156.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 27.84 ms. Allocated memory is still 191.9 MB. Free memory was 155.8 MB in the beginning and 154.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15061.36 ms. Allocated memory was 191.9 MB in the beginning and 276.8 MB in the end (delta: 84.9 MB). Free memory was 154.2 MB in the beginning and 143.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 97.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15025.1ms, OverallIterations: 19, TraceHistogramMax: 8, EmptinessCheckTime: 26.5ms, AutomataDifference: 6069.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 913 SDtfs, 940 SDslu, 4563 SDs, 0 SdLazy, 4516 SolverSat, 779 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2792.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1142 GetRequests, 883 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 3608.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=351occurred in iteration=18, InterpolantAutomatonStates: 220, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 171.5ms AutomataMinimizationTime, 19 MinimizatonAttempts, 388 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 156.6ms SsaConstructionTime, 417.8ms SatisfiabilityAnalysisTime, 3638.7ms InterpolantComputationTime, 1061 NumberOfCodeBlocks, 1017 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1042 ConstructedInterpolants, 0 QuantifiedInterpolants, 5056 SizeOfPredicates, 96 NumberOfNonLiveVariables, 3466 ConjunctsInSsa, 450 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 915/1105 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...